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

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

Change-Id: Ia221149f7690421d001bc528e738f34550b27d7a
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>