[ConstraintSystem] Avoid member lookup if base type is a "hole"
[ConstraintSystem] Avoid member lookup if base type is a "hole"

Member lookup on a "hole" is not going to produce any results
and it makes sense to detect early and short-circuit the constraint.

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