Expose CXX_FLAGS through __config__ (#47861)
Summary: Pull Request resolved: https://github.com/pytorch/pytorch/pull/47861
Test Plan: Imported from OSS
Reviewed By: ngimel
Differential Revision: D25199263
Pulled By: robieta
fbshipit-source-id: 3cfdb0485d686a03a68dd0907d1733634857963f
