Clear frame cache when activating a fiber
Clear frame cache when activating a fiber

Reviewed By: yfeldblum

Differential Revision: D6207160

fbshipit-source-id: 57468c9d05cdb3ee6e1d10a3a254a5d1bfddc36f

facebook/folly,Orvid/folly,Orvid/folly,rklabs/folly,Orvid/folly,facebook/folly,Orvid/folly,facebook/folly,facebook/folly,facebook/folly,rklabs/folly,rklabs/folly,rklabs/folly,rklabs/folly,Orvid/folly