Vanilla Pytorch bionic clang9 test in CI (#36711)
Summary:
fixes https://github.com/pytorch/pytorch/issues/36676
Pull Request resolved: https://github.com/pytorch/pytorch/pull/36711
Differential Revision: D21148986
Pulled By: ailzhang
fbshipit-source-id: e383bd50c893b5eee850eab65aa4681a6b491706
