Use llvm::StringSet for PrimaryFiles.
Use llvm::StringSet for PrimaryFiles.

stephentyrone/swift,devincoughlin/swift,glessard/swift,harlanhaskins/swift,rudkx/swift,practicalswift/swift,jmgc/swift,frootloops/swift,tkremenek/swift,roambotics/swift,jmgc/swift,shajrawi/swift,roambotics/swift,practicalswift/swift,rudkx/swift,stephentyrone/swift,frootloops/swift,xedin/swift,amraboelela/swift,brentdax/swift,sschiau/swift,devincoughlin/swift,huonw/swift,hooman/swift,JGiola/swift,jckarter/swift,jopamer/swift,zisko/swift,danielmartin/swift,zisko/swift,glessard/swift,CodaFi/swift,natecook1000/swift,natecook1000/swift,zisko/swift,shahmishal/swift,atrick/swift,airspeedswift/swift,frootloops/swift,practicalswift/swift,benlangmuir/swift,tkremenek/swift,karwa/swift,parkera/swift,sschiau/swift,huonw/swift,gregomni/swift,brentdax/swift,austinzheng/swift,hooman/swift,rudkx/swift,roambotics/swift,lorentey/swift,tjw/swift,huonw/swift,JGiola/swift,aschwaighofer/swift,roambotics/swift,hooman/swift,brentdax/swift,tjw/swift,jckarter/swift,nathawes/swift,jopamer/swift,jopamer/swift,brentdax/swift,ahoppen/swift,apple/swift,allevato/swift,lorentey/swift,parkera/swift,glessard/swift,allevato/swift,aschwaighofer/swift,natecook1000/swift,sschiau/swift,frootloops/swift,austinzheng/swift,harlanhaskins/swift,hooman/swift,shahmishal/swift,allevato/swift,lorentey/swift,airspeedswift/swift,airspeedswift/swift,allevato/swift,austinzheng/swift,parkera/swift,shahmishal/swift,sschiau/swift,JGiola/swift,aschwaighofer/swift,practicalswift/swift,parkera/swift,zisko/swift,parkera/swift,natecook1000/swift,practicalswift/swift,benlangmuir/swift,alblue/swift,harlanhaskins/swift,karwa/swift,devincoughlin/swift,nathawes/swift,jckarter/swift,devincoughlin/swift,JGiola/swift,austinzheng/swift,shajrawi/swift,frootloops/swift,shajrawi/swift,devincoughlin/swift,gregomni/swift,alblue/swift,airspeedswift/swift,rudkx/swift,danielmartin/swift,xwu/swift,karwa/swift,karwa/swift,practicalswift/swift,xedin/swift,parkera/swift,devincoughlin/swift,benlangmuir/swift,gribozavr/swift,xedin/swift,harlanhaskins/swift,ahoppen/swift,sschiau/swift,austinzheng/swift,tjw/swift,karwa/swift,gribozavr/swift,stephentyrone/swift,atrick/swift,lorentey/swift,devincoughlin/swift,xedin/swift,aschwaighofer/swift,danielmartin/swift,natecook1000/swift,danielmartin/swift,jmgc/swift,zisko/swift,apple/swift,danielmartin/swift,shajrawi/swift,xedin/swift,ahoppen/swift,xwu/swift,ahoppen/swift,amraboelela/swift,jopamer/swift,jmgc/swift,aschwaighofer/swift,gregomni/swift,devincoughlin/swift,danielmartin/swift,tjw/swift,xwu/swift,parkera/swift,zisko/swift,sschiau/swift,karwa/swift,gregomni/swift,xedin/swift,shahmishal/swift,roambotics/swift,harlanhaskins/swift,amraboelela/swift,tkremenek/swift,harlanhaskins/swift,gribozavr/swift,jmgc/swift,alblue/swift,danielmartin/swift,benlangmuir/swift,CodaFi/swift,sschiau/swift,jopamer/swift,gribozavr/swift,aschwaighofer/swift,shahmishal/swift,karwa/swift,practicalswift/swift,glessard/swift,apple/swift,austinzheng/swift,shajrawi/swift,hooman/swift,glessard/swift,karwa/swift,stephentyrone/swift,gregomni/swift,lorentey/swift,aschwaighofer/swift,CodaFi/swift,gribozavr/swift,allevato/swift,jckarter/swift,alblue/swift,natecook1000/swift,stephentyrone/swift,alblue/swift,lorentey/swift,ahoppen/swift,nathawes/swift,tkremenek/swift,nathawes/swift,lorentey/swift,stephentyrone/swift,xedin/swift,huonw/swift,natecook1000/swift,sschiau/swift,shajrawi/swift,austinzheng/swift,shajrawi/swift,tkremenek/swift,shajrawi/swift,parkera/swift,airspeedswift/swift,atrick/swift,apple/swift,hooman/swift,shahmishal/swift,amraboelela/swift,ahoppen/swift,atrick/swift,tkremenek/swift,tjw/swift,practicalswift/swift,gregomni/swift,glessard/swift,alblue/swift,atrick/swift,CodaFi/swift,alblue/swift,jopamer/swift,huonw/swift,xwu/swift,shahmishal/swift,apple/swift,nathawes/swift,CodaFi/swift,nathawes/swift,huonw/swift,jckarter/swift,xedin/swift,nathawes/swift,tkremenek/swift,amraboelela/swift,huonw/swift,brentdax/swift,jmgc/swift,gribozavr/swift,xwu/swift,xwu/swift,jckarter/swift,hooman/swift,airspeedswift/swift,JGiola/swift,rudkx/swift,tjw/swift,roambotics/swift,JGiola/swift,amraboelela/swift,CodaFi/swift,lorentey/swift,jckarter/swift,allevato/swift,allevato/swift,amraboelela/swift,frootloops/swift,shahmishal/swift,gribozavr/swift,apple/swift,gribozavr/swift,brentdax/swift,frootloops/swift,CodaFi/swift,xwu/swift,jopamer/swift,brentdax/swift,atrick/swift,airspeedswift/swift,tjw/swift,rudkx/swift,benlangmuir/swift,stephentyrone/swift,harlanhaskins/swift,zisko/swift,jmgc/swift,benlangmuir/swift