Merge "Migrate clang-version-inc.py to python3" am: 53e290249a am: b8e8dddd89 am: 2c6a4eb063

Original change: https://android-review.googlesource.com/c/platform/external/clang/+/2172131

Change-Id: Ie87b77816a0093ac6664756d54fb0e900b7412ff
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>