Use python3 instead of python The script fails if there is no binary called python, which is the case on my workstation, and soon will be the case on our bots. Bug: 1340750 Change-Id: I3c38894a4e56f21f26e0cd088da4bcd793fb9435 Reviewed-on: https://chromium-review.googlesource.com/c/native_client/pnacl-llvm/+/3745957 Reviewed-by: Derek Schuff <[email protected]>