Wrap fsync(2) and fdatasync(2)

This adds two new functions in `System.Posix.Unistd`

 - `fileSynchronise` (aka `fsync(2)`), and
 - `fileSynchroniseDataOnly` (aka `fdatasync(2)`)

This is based on part of #7 and has been heavily refactored from its
original patch submission by Ricardo Catalinas Jiménez.

This also bumps version to 2.7.1.0 as a minor version bump is now needed.

Signed-off-by: Herbert Valerio Riedel <hvr@gnu.org>

1 files changed, 1 insertions, 1 deletions

diff --git a/unix.cabal b/unix.cabal
index 69470ba..7bcf0d9 100644
--- a/unix.cabal
+++ b/unix.cabal
@@ -1,5 +1,5 @@
 name:           unix
-version:        2.7.0.2
+version:        2.7.1.0
 -- NOTE: Don't forget to update ./changelog.md
 license:        BSD3
 license-file:   LICENSE