add os type filtering to generate-github-actions
add os type filtering to generate-github-actions

Summary: Hand to do just one

Reviewed By: zpao

Differential Revision: D32693529

fbshipit-source-id: ac27c79f8a43c540e3b0836eba3a40bd61dd725b

facebook/bistro,facebook/bistro,facebook/bistro,facebook/bistro,facebook/bistro,facebook/bistro