Include the current commit as part of the build process. BUG=angle:529 Change-Id: I6d1d227b495e9bae6e017c88642679210c6d2355 Reviewed-on: https://chromium-review.googlesource.com/177233 Reviewed-by: Shannon Woods <shannonwoods@chromium.org> Commit-Queue: Shannon Woods <shannonwoods@chromium.org> Tested-by: Shannon Woods <shannonwoods@chromium.org>