Support coverage in experimental_ios_test.

Coverage depends on quite a few moving parts, several of which were changed for this test:

- BuildConfiguration.getCoverageLabels() used to include gcov support, this is now replaced by the dedicated getGcovLabels() and a separate implicit attribute on TestBaseRule. This new attribute is then overridden in ExperimentalIosTest to use an xcode-compatible gcov.
- Objc's TestSupport now correctly registers instrumented files and sets the necessary runfiles for collecting coverage.
- ios_test's template exports gcda files for coverage computation after the test's execution.

--
MOS_MIGRATED_REVID=99374435

1 files changed, 1 insertions, 1 deletions

diff --git a/src/main/java/com/google/devtools/build/lib/rules/cpp/CppConfiguration.java b/src/main/java/com/google/devtools/build/lib/rules/cpp/CppConfiguration.java
index 06c9e6b9cc..a32c11697b 100644
--- a/src/main/java/com/google/devtools/build/lib/rules/cpp/CppConfiguration.java
+++ b/src/main/java/com/google/devtools/build/lib/rules/cpp/CppConfiguration.java
@@ -1806,7 +1806,7 @@ public class CppConfiguration extends BuildConfiguration.Fragment {
   }
 
   @Override
-  public ImmutableList<Label> getCoverageLabels() {
+  public ImmutableList<Label> getGcovLabels() {
     // TODO(bazel-team): Using a gcov-specific crosstool filegroup here could reduce the number of
     // inputs significantly. We'd also need to add logic in tools/coverage/collect_coverage.sh to
     // drop crosstool dependency if metadataFiles does not contain *.gcno artifacts.