Merge "clang: make clang-version-inc.py request python2 interpreter" am: 8a27dee9fe am: 8bb858d9ad am: 5b55a29058

Original change: https://android-review.googlesource.com/c/platform/external/clang/+/1478398

Change-Id: If2aefdf4be95614dbbefa0800066642f2072314e