Harmonize Python shebang

Differential Revision: https://reviews.llvm.org/D83857

Cr-Mirrored-From: https://chromium.googlesource.com/external/github.com/llvm/llvm-project
Cr-Mirrored-Commit: 515bc8c1554f03515565878ea3d35cffdc6fd195
1 file changed