change invariant for generateExtraFiles
change invariant for generateExtraFiles

Reviewed By: kassens

Differential Revision: D5672573

fbshipit-source-id: b2a9479959c8631397eec9fba1b3c2c15b5e6cc2

xuorig/relay,atxwebs/relay,voideanvalue/relay,iamchenxin/relay,josephsavona/relay,wincent/relay,wincent/relay,apalm/relay,zpao/relay,atxwebs/relay,wincent/relay,apalm/relay,wincent/relay,dbslone/relay,zpao/relay,facebook/relay,dbslone/relay,cpojer/relay,apalm/relay,facebook/relay,yungsters/relay,xuorig/relay,josephsavona/relay,voideanvalue/relay,xuorig/relay,facebook/relay,voideanvalue/relay,iamchenxin/relay,facebook/relay,freiksenet/relay,voideanvalue/relay,yungsters/relay,kassens/relay,iamchenxin/relay,rosskevin/relay,cpojer/relay,wincent/relay,benjaminogles/relay,facebook/relay,josephsavona/relay,voideanvalue/relay,voideanvalue/relay,facebook/relay,freiksenet/relay,xuorig/relay,benjaminogles/relay,kassens/relay,xuorig/relay,freiksenet/relay,benjaminogles/relay,atxwebs/relay,kassens/relay,zpao/relay,rosskevin/relay,yungsters/relay,wincent/relay,kassens/relay,iamchenxin/relay,cpojer/relay,xuorig/relay,atxwebs/relay,cpojer/relay,kassens/relay,kassens/relay