setup system includes for generated files on MacOS (#73591)
Summary: Pull Request resolved: https://github.com/pytorch/pytorch/pull/73591
Test Plan: Imported from OSS
Reviewed By: malfet
Differential Revision: D34558342
Pulled By: dagitses
fbshipit-source-id: 6914a9a95d73105356e7b9c1543deab8bbdeec57
(cherry picked from commit 8b2e338827e39fcb35c3031fa22b2b1575a2c399)
