Add support for building from facebookincubator repos
Add support for building from facebookincubator repos

Summary: Currently, fbcode_builder assumes you're building code living in the facebook github org. If you try to do travis builds using a facebookincubator repo, an error occurs due to hard-coded assumptions about the org. This fixes that

Reviewed By: knekritz

Differential Revision: D9183307

fbshipit-source-id: 0a1ac399953485e84f0534cc0616765227088c80

facebook/folly,facebook/folly,facebook/folly,facebook/folly,facebook/folly