Export of internal Abseil changes

--
017c3924d21132085bc20c9be0ae469bfbf2c56c by Gennadiy Rozental <rogeeff@google.com>:

Import of CCTZ from GitHub.

PiperOrigin-RevId: 338723934

--
8b08c23d7b05232e283b1388cee3eb5bebc2d9c4 by Derek Mauro <dmauro@google.com>:

Add script to test GCC floor (the minimum version of GCC we support,
currently the GCC 5 series)

PiperOrigin-RevId: 338708581

--
afa440ac7c843126b4f99b89ebc071dda1d85a4d by Abseil Team <absl-team@google.com>:

Fix typo in documentation of StatusOr::value_or() ('of' -> 'if').

PiperOrigin-RevId: 338690089

--
97d5008865327fc36b942b96de0d0cacfb909df5 by Derek Mauro <dmauro@google.com>:

Import of CCTZ from GitHub.

PiperOrigin-RevId: 338568224

--
da5e09a7fedb3217329465d9206b7cbc6677176b by Abseil Team <absl-team@google.com>:

Add `absl_btree_prefer_linear_node_search`

Allow keys of `btree_set`, `btree_map`, `btree_multiset`, and `btree_multimap`
to opt-in to linear search (instead of binary search).  Linear search was
used previously for arithmetic types with `key_compare` of `std::greater`
or `std::less`.

For example, this would be useful for key types that wrap an integer
and define their own cheap `operator<()`.

```
 class K {
  public:
   using absl_btree_prefer_linear_node_search = std::true_type;
   ...
  private:
   friend bool operator<(K a, K b) { return a.k_ < b.k_; }
   int k_;
 };

 absl::btree_map<K, V> m;  // Uses linear search
 assert((absl::btree_map<K, V>::testonly_uses_linear_node_search()));
```

PiperOrigin-RevId: 338476553

--
c56ead7ce6b0a5ad32e3a42904c686448a69451e by Gennadiy Rozental <rogeeff@google.com>:

Import of CCTZ from GitHub.

PiperOrigin-RevId: 338419417
GitOrigin-RevId: 017c3924d21132085bc20c9be0ae469bfbf2c56c
Change-Id: I1199f3ae917280a3ef20ccc6038abbe34d96ec0b

35 files changed, 0 insertions, 0 deletions

diff --git a/absl/time/internal/cctz/testdata/zoneinfo/Etc/GMT b/absl/time/internal/cctz/testdata/zoneinfo/Etc/GMT
index c6347466..157573b1 100644
--- a/absl/time/internal/cctz/testdata/zoneinfo/Etc/GMT
+++ b/absl/time/internal/cctz/testdata/zoneinfo/Etc/GMT
diff --git a/absl/time/internal/cctz/testdata/zoneinfo/Etc/GMT+0 b/absl/time/internal/cctz/testdata/zoneinfo/Etc/GMT+0
index c6347466..157573b1 100644
--- a/absl/time/internal/cctz/testdata/zoneinfo/Etc/GMT+0
+++ b/absl/time/internal/cctz/testdata/zoneinfo/Etc/GMT+0
diff --git a/absl/time/internal/cctz/testdata/zoneinfo/Etc/GMT+1 b/absl/time/internal/cctz/testdata/zoneinfo/Etc/GMT+1
index 4dab6f90..98d5dcf9 100644
--- a/absl/time/internal/cctz/testdata/zoneinfo/Etc/GMT+1
+++ b/absl/time/internal/cctz/testdata/zoneinfo/Etc/GMT+1
diff --git a/absl/time/internal/cctz/testdata/zoneinfo/Etc/GMT+10 b/absl/time/internal/cctz/testdata/zoneinfo/Etc/GMT+10
index c749290a..ecb287e6 100644
--- a/absl/time/internal/cctz/testdata/zoneinfo/Etc/GMT+10
+++ b/absl/time/internal/cctz/testdata/zoneinfo/Etc/GMT+10
diff --git a/absl/time/internal/cctz/testdata/zoneinfo/Etc/GMT+11 b/absl/time/internal/cctz/testdata/zoneinfo/Etc/GMT+11
index d9699823..e9414129 100644
--- a/absl/time/internal/cctz/testdata/zoneinfo/Etc/GMT+11
+++ b/absl/time/internal/cctz/testdata/zoneinfo/Etc/GMT+11
diff --git a/absl/time/internal/cctz/testdata/zoneinfo/Etc/GMT+12 b/absl/time/internal/cctz/testdata/zoneinfo/Etc/GMT+12
index cdeec909..9c95bd07 100644
--- a/absl/time/internal/cctz/testdata/zoneinfo/Etc/GMT+12
+++ b/absl/time/internal/cctz/testdata/zoneinfo/Etc/GMT+12
diff --git a/absl/time/internal/cctz/testdata/zoneinfo/Etc/GMT+2 b/absl/time/internal/cctz/testdata/zoneinfo/Etc/GMT+2
index fbd2a941..6d5ce3db 100644
--- a/absl/time/internal/cctz/testdata/zoneinfo/Etc/GMT+2
+++ b/absl/time/internal/cctz/testdata/zoneinfo/Etc/GMT+2
diff --git a/absl/time/internal/cctz/testdata/zoneinfo/Etc/GMT+3 b/absl/time/internal/cctz/testdata/zoneinfo/Etc/GMT+3
index ee246ef5..5ef7be71 100644
--- a/absl/time/internal/cctz/testdata/zoneinfo/Etc/GMT+3
+++ b/absl/time/internal/cctz/testdata/zoneinfo/Etc/GMT+3
diff --git a/absl/time/internal/cctz/testdata/zoneinfo/Etc/GMT+4 b/absl/time/internal/cctz/testdata/zoneinfo/Etc/GMT+4
index 5a25ff2a..75f16216 100644
--- a/absl/time/internal/cctz/testdata/zoneinfo/Etc/GMT+4
+++ b/absl/time/internal/cctz/testdata/zoneinfo/Etc/GMT+4
diff --git a/absl/time/internal/cctz/testdata/zoneinfo/Etc/GMT+5 b/absl/time/internal/cctz/testdata/zoneinfo/Etc/GMT+5
index c0b745f1..589990ae 100644
--- a/absl/time/internal/cctz/testdata/zoneinfo/Etc/GMT+5
+++ b/absl/time/internal/cctz/testdata/zoneinfo/Etc/GMT+5
diff --git a/absl/time/internal/cctz/testdata/zoneinfo/Etc/GMT+6 b/absl/time/internal/cctz/testdata/zoneinfo/Etc/GMT+6
index 06e777d5..fcb60ca2 100644
--- a/absl/time/internal/cctz/testdata/zoneinfo/Etc/GMT+6
+++ b/absl/time/internal/cctz/testdata/zoneinfo/Etc/GMT+6
diff --git a/absl/time/internal/cctz/testdata/zoneinfo/Etc/GMT+7 b/absl/time/internal/cctz/testdata/zoneinfo/Etc/GMT+7
index 4e0b53a0..c0427a40 100644
--- a/absl/time/internal/cctz/testdata/zoneinfo/Etc/GMT+7
+++ b/absl/time/internal/cctz/testdata/zoneinfo/Etc/GMT+7
diff --git a/absl/time/internal/cctz/testdata/zoneinfo/Etc/GMT+8 b/absl/time/internal/cctz/testdata/zoneinfo/Etc/GMT+8
index 714b0c56..9bdc2283 100644
--- a/absl/time/internal/cctz/testdata/zoneinfo/Etc/GMT+8
+++ b/absl/time/internal/cctz/testdata/zoneinfo/Etc/GMT+8
diff --git a/absl/time/internal/cctz/testdata/zoneinfo/Etc/GMT+9 b/absl/time/internal/cctz/testdata/zoneinfo/Etc/GMT+9
index 78b9daa3..ca7a81f6 100644
--- a/absl/time/internal/cctz/testdata/zoneinfo/Etc/GMT+9
+++ b/absl/time/internal/cctz/testdata/zoneinfo/Etc/GMT+9
diff --git a/absl/time/internal/cctz/testdata/zoneinfo/Etc/GMT-0 b/absl/time/internal/cctz/testdata/zoneinfo/Etc/GMT-0
index c6347466..157573b1 100644
--- a/absl/time/internal/cctz/testdata/zoneinfo/Etc/GMT-0
+++ b/absl/time/internal/cctz/testdata/zoneinfo/Etc/GMT-0
diff --git a/absl/time/internal/cctz/testdata/zoneinfo/Etc/GMT-1 b/absl/time/internal/cctz/testdata/zoneinfo/Etc/GMT-1
index a838bebf..cb45601c 100644
--- a/absl/time/internal/cctz/testdata/zoneinfo/Etc/GMT-1
+++ b/absl/time/internal/cctz/testdata/zoneinfo/Etc/GMT-1
diff --git a/absl/time/internal/cctz/testdata/zoneinfo/Etc/GMT-10 b/absl/time/internal/cctz/testdata/zoneinfo/Etc/GMT-10
index 68ff77db..11d988e1 100644
--- a/absl/time/internal/cctz/testdata/zoneinfo/Etc/GMT-10
+++ b/absl/time/internal/cctz/testdata/zoneinfo/Etc/GMT-10
diff --git a/absl/time/internal/cctz/testdata/zoneinfo/Etc/GMT-11 b/absl/time/internal/cctz/testdata/zoneinfo/Etc/GMT-11
index 66af5a42..f4c5d5cc 100644
--- a/absl/time/internal/cctz/testdata/zoneinfo/Etc/GMT-11
+++ b/absl/time/internal/cctz/testdata/zoneinfo/Etc/GMT-11
diff --git a/absl/time/internal/cctz/testdata/zoneinfo/Etc/GMT-12 b/absl/time/internal/cctz/testdata/zoneinfo/Etc/GMT-12
index 17ba5057..cd397b02 100644
--- a/absl/time/internal/cctz/testdata/zoneinfo/Etc/GMT-12
+++ b/absl/time/internal/cctz/testdata/zoneinfo/Etc/GMT-12
diff --git a/absl/time/internal/cctz/testdata/zoneinfo/Etc/GMT-13 b/absl/time/internal/cctz/testdata/zoneinfo/Etc/GMT-13
index 5f3706ce..8fad7c6b 100644
--- a/absl/time/internal/cctz/testdata/zoneinfo/Etc/GMT-13
+++ b/absl/time/internal/cctz/testdata/zoneinfo/Etc/GMT-13
diff --git a/absl/time/internal/cctz/testdata/zoneinfo/Etc/GMT-14 b/absl/time/internal/cctz/testdata/zoneinfo/Etc/GMT-14
index 7e9f9c46..a595e60e 100644
--- a/absl/time/internal/cctz/testdata/zoneinfo/Etc/GMT-14
+++ b/absl/time/internal/cctz/testdata/zoneinfo/Etc/GMT-14
diff --git a/absl/time/internal/cctz/testdata/zoneinfo/Etc/GMT-2 b/absl/time/internal/cctz/testdata/zoneinfo/Etc/GMT-2
index fcef6d9a..97b44a9b 100644
--- a/absl/time/internal/cctz/testdata/zoneinfo/Etc/GMT-2
+++ b/absl/time/internal/cctz/testdata/zoneinfo/Etc/GMT-2
diff --git a/absl/time/internal/cctz/testdata/zoneinfo/Etc/GMT-3 b/absl/time/internal/cctz/testdata/zoneinfo/Etc/GMT-3
index 27973bc8..4eb17ff0 100644
--- a/absl/time/internal/cctz/testdata/zoneinfo/Etc/GMT-3
+++ b/absl/time/internal/cctz/testdata/zoneinfo/Etc/GMT-3
diff --git a/absl/time/internal/cctz/testdata/zoneinfo/Etc/GMT-4 b/absl/time/internal/cctz/testdata/zoneinfo/Etc/GMT-4
index 1efd8412..13aef80c 100644
--- a/absl/time/internal/cctz/testdata/zoneinfo/Etc/GMT-4
+++ b/absl/time/internal/cctz/testdata/zoneinfo/Etc/GMT-4
diff --git a/absl/time/internal/cctz/testdata/zoneinfo/Etc/GMT-5 b/absl/time/internal/cctz/testdata/zoneinfo/Etc/GMT-5
index 1f761844..83a28169 100644
--- a/absl/time/internal/cctz/testdata/zoneinfo/Etc/GMT-5
+++ b/absl/time/internal/cctz/testdata/zoneinfo/Etc/GMT-5
diff --git a/absl/time/internal/cctz/testdata/zoneinfo/Etc/GMT-6 b/absl/time/internal/cctz/testdata/zoneinfo/Etc/GMT-6
index 952681ed..79a983e5 100644
--- a/absl/time/internal/cctz/testdata/zoneinfo/Etc/GMT-6
+++ b/absl/time/internal/cctz/testdata/zoneinfo/Etc/GMT-6
diff --git a/absl/time/internal/cctz/testdata/zoneinfo/Etc/GMT-7 b/absl/time/internal/cctz/testdata/zoneinfo/Etc/GMT-7
index cefc9126..e136690e 100644
--- a/absl/time/internal/cctz/testdata/zoneinfo/Etc/GMT-7
+++ b/absl/time/internal/cctz/testdata/zoneinfo/Etc/GMT-7
diff --git a/absl/time/internal/cctz/testdata/zoneinfo/Etc/GMT-8 b/absl/time/internal/cctz/testdata/zoneinfo/Etc/GMT-8
index afb093da..bc70fe41 100644
--- a/absl/time/internal/cctz/testdata/zoneinfo/Etc/GMT-8
+++ b/absl/time/internal/cctz/testdata/zoneinfo/Etc/GMT-8
diff --git a/absl/time/internal/cctz/testdata/zoneinfo/Etc/GMT-9 b/absl/time/internal/cctz/testdata/zoneinfo/Etc/GMT-9
index 9265fb7c..d18cedd5 100644
--- a/absl/time/internal/cctz/testdata/zoneinfo/Etc/GMT-9
+++ b/absl/time/internal/cctz/testdata/zoneinfo/Etc/GMT-9
diff --git a/absl/time/internal/cctz/testdata/zoneinfo/Etc/GMT0 b/absl/time/internal/cctz/testdata/zoneinfo/Etc/GMT0
index c6347466..157573b1 100644
--- a/absl/time/internal/cctz/testdata/zoneinfo/Etc/GMT0
+++ b/absl/time/internal/cctz/testdata/zoneinfo/Etc/GMT0
diff --git a/absl/time/internal/cctz/testdata/zoneinfo/Etc/Greenwich b/absl/time/internal/cctz/testdata/zoneinfo/Etc/Greenwich
index c6347466..157573b1 100644
--- a/absl/time/internal/cctz/testdata/zoneinfo/Etc/Greenwich
+++ b/absl/time/internal/cctz/testdata/zoneinfo/Etc/Greenwich
diff --git a/absl/time/internal/cctz/testdata/zoneinfo/Etc/UCT b/absl/time/internal/cctz/testdata/zoneinfo/Etc/UCT
index 91558be0..00841a62 100644
--- a/absl/time/internal/cctz/testdata/zoneinfo/Etc/UCT
+++ b/absl/time/internal/cctz/testdata/zoneinfo/Etc/UCT
diff --git a/absl/time/internal/cctz/testdata/zoneinfo/Etc/UTC b/absl/time/internal/cctz/testdata/zoneinfo/Etc/UTC
index 91558be0..00841a62 100644
--- a/absl/time/internal/cctz/testdata/zoneinfo/Etc/UTC
+++ b/absl/time/internal/cctz/testdata/zoneinfo/Etc/UTC
diff --git a/absl/time/internal/cctz/testdata/zoneinfo/Etc/Universal b/absl/time/internal/cctz/testdata/zoneinfo/Etc/Universal
index 91558be0..00841a62 100644
--- a/absl/time/internal/cctz/testdata/zoneinfo/Etc/Universal
+++ b/absl/time/internal/cctz/testdata/zoneinfo/Etc/Universal
diff --git a/absl/time/internal/cctz/testdata/zoneinfo/Etc/Zulu b/absl/time/internal/cctz/testdata/zoneinfo/Etc/Zulu
index 91558be0..00841a62 100644
--- a/absl/time/internal/cctz/testdata/zoneinfo/Etc/Zulu
+++ b/absl/time/internal/cctz/testdata/zoneinfo/Etc/Zulu