Pre-commit flake8/clang-tidy (#15102)
Summary:
Provide a pre-commit hook that does flake8 and clang tidy checks. Enables the clang-tidy script to run in parallel to make it fast enough to be used in a pre-commit hook.
Pull Request resolved: https://github.com/pytorch/pytorch/pull/15102
Reviewed By: soumith
Differential Revision: D13429629
Pulled By: zdevito
fbshipit-source-id: bd52fe5652f29b033de8d9926d78350b2da4c2fc
