Add PointerLikeTypeTraits to ApplySite and FullApplySite.
Add PointerLikeTypeTraits to ApplySite and FullApplySite.

So they can be used in ADTs like SmallPtrSet.

glessard/swift,parkera/swift,harlanhaskins/swift,hooman/swift,CodaFi/swift,atrick/swift,benlangmuir/swift,allevato/swift,atrick/swift,jmgc/swift,parkera/swift,JGiola/swift,roambotics/swift,jckarter/swift,tkremenek/swift,airspeedswift/swift,gregomni/swift,airspeedswift/swift,parkera/swift,jmgc/swift,parkera/swift,rudkx/swift,apple/swift,CodaFi/swift,atrick/swift,roambotics/swift,aschwaighofer/swift,CodaFi/swift,roambotics/swift,xwu/swift,jckarter/swift,JGiola/swift,stephentyrone/swift,aschwaighofer/swift,nathawes/swift,gregomni/swift,CodaFi/swift,hooman/swift,xwu/swift,stephentyrone/swift,apple/swift,gregomni/swift,gregomni/swift,glessard/swift,nathawes/swift,apple/swift,rudkx/swift,atrick/swift,jckarter/swift,rudkx/swift,CodaFi/swift,xwu/swift,allevato/swift,stephentyrone/swift,allevato/swift,parkera/swift,apple/swift,hooman/swift,JGiola/swift,nathawes/swift,roambotics/swift,tkremenek/swift,jmgc/swift,aschwaighofer/swift,rudkx/swift,allevato/swift,aschwaighofer/swift,jckarter/swift,jmgc/swift,tkremenek/swift,nathawes/swift,glessard/swift,harlanhaskins/swift,JGiola/swift,aschwaighofer/swift,airspeedswift/swift,ahoppen/swift,ahoppen/swift,allevato/swift,xwu/swift,jmgc/swift,roambotics/swift,parkera/swift,stephentyrone/swift,nathawes/swift,gregomni/swift,glessard/swift,rudkx/swift,hooman/swift,benlangmuir/swift,jckarter/swift,apple/swift,benlangmuir/swift,rudkx/swift,stephentyrone/swift,glessard/swift,hooman/swift,nathawes/swift,benlangmuir/swift,airspeedswift/swift,glessard/swift,airspeedswift/swift,parkera/swift,JGiola/swift,nathawes/swift,benlangmuir/swift,CodaFi/swift,airspeedswift/swift,atrick/swift,tkremenek/swift,ahoppen/swift,airspeedswift/swift,ahoppen/swift,ahoppen/swift,tkremenek/swift,stephentyrone/swift,allevato/swift,parkera/swift,apple/swift,hooman/swift,JGiola/swift,xwu/swift,xwu/swift,harlanhaskins/swift,harlanhaskins/swift,hooman/swift,aschwaighofer/swift,harlanhaskins/swift,gregomni/swift,atrick/swift,harlanhaskins/swift,harlanhaskins/swift,tkremenek/swift,aschwaighofer/swift,roambotics/swift,ahoppen/swift,jckarter/swift,jmgc/swift,jmgc/swift,allevato/swift,tkremenek/swift,benlangmuir/swift,CodaFi/swift,jckarter/swift,xwu/swift,stephentyrone/swift