Fix build errors:
authorCort Stratton <cort@google.com>
Thu, 23 Nov 2017 00:04:23 +0000 (16:04 -0800)
committerChris Forbes <chrisf@ijw.co.nz>
Wed, 29 Nov 2017 00:27:21 +0000 (16:27 -0800)
commite901608d09410f24587f1ee8b5d7bdbe2eb1e0b7
tree9cada228abbdc553d975ab3c2853aea264d214cb
parentf6a3ecd8ddadbc7bfd59105cebe50a01ef402063
Fix build errors:

- No more SPIRV-Tools revision file. Instead, the
  revision-parsing script just runs "git rev-parse HEAD"
  in the spirv-tools repository to extract the commit ID.
- Invoke the revision-parsing script from the .sh Android scripts,
  in addition to the .bat scripts.
CMakeLists.txt
build-android/android-generate.bat
build-android/android-generate.sh
scripts/external_revision_generator.py