[Name lookup] Generalize member lookup check for extensions as well.
[Name lookup] Generalize member lookup check for extensions as well.

We only look for members within the extension’s type when we are in the
body or a protocol extension’s where clause.
shajrawi/swift,CodaFi/swift,brentdax/swift,stephentyrone/swift,alblue/swift,allevato/swift,hooman/swift,xedin/swift,benlangmuir/swift,apple/swift,apple/swift,sschiau/swift,gribozavr/swift,hooman/swift,gribozavr/swift,JGiola/swift,xedin/swift,devincoughlin/swift,benlangmuir/swift,roambotics/swift,alblue/swift,shajrawi/swift,hooman/swift,lorentey/swift,nathawes/swift,airspeedswift/swift,brentdax/swift,sschiau/swift,hooman/swift,atrick/swift,stephentyrone/swift,benlangmuir/swift,stephentyrone/swift,natecook1000/swift,glessard/swift,lorentey/swift,aschwaighofer/swift,parkera/swift,practicalswift/swift,danielmartin/swift,JGiola/swift,shajrawi/swift,roambotics/swift,shahmishal/swift,rudkx/swift,jmgc/swift,jmgc/swift,karwa/swift,lorentey/swift,shahmishal/swift,JGiola/swift,airspeedswift/swift,jckarter/swift,atrick/swift,xedin/swift,jckarter/swift,amraboelela/swift,brentdax/swift,amraboelela/swift,stephentyrone/swift,ahoppen/swift,jmgc/swift,practicalswift/swift,glessard/swift,tkremenek/swift,xwu/swift,glessard/swift,devincoughlin/swift,parkera/swift,harlanhaskins/swift,sschiau/swift,atrick/swift,shahmishal/swift,stephentyrone/swift,natecook1000/swift,nathawes/swift,ahoppen/swift,JGiola/swift,gregomni/swift,nathawes/swift,jckarter/swift,apple/swift,austinzheng/swift,natecook1000/swift,rudkx/swift,shahmishal/swift,alblue/swift,nathawes/swift,lorentey/swift,harlanhaskins/swift,tkremenek/swift,parkera/swift,apple/swift,ahoppen/swift,danielmartin/swift,shahmishal/swift,xedin/swift,natecook1000/swift,airspeedswift/swift,CodaFi/swift,glessard/swift,nathawes/swift,karwa/swift,lorentey/swift,parkera/swift,austinzheng/swift,CodaFi/swift,nathawes/swift,jmgc/swift,roambotics/swift,lorentey/swift,rudkx/swift,gribozavr/swift,karwa/swift,aschwaighofer/swift,alblue/swift,airspeedswift/swift,harlanhaskins/swift,parkera/swift,xwu/swift,gribozavr/swift,amraboelela/swift,apple/swift,tkremenek/swift,aschwaighofer/swift,xedin/swift,tkremenek/swift,roambotics/swift,allevato/swift,practicalswift/swift,xedin/swift,xwu/swift,austinzheng/swift,apple/swift,devincoughlin/swift,shajrawi/swift,stephentyrone/swift,shajrawi/swift,tkremenek/swift,alblue/swift,JGiola/swift,benlangmuir/swift,aschwaighofer/swift,benlangmuir/swift,jckarter/swift,gribozavr/swift,aschwaighofer/swift,natecook1000/swift,harlanhaskins/swift,allevato/swift,gregomni/swift,danielmartin/swift,austinzheng/swift,ahoppen/swift,karwa/swift,CodaFi/swift,natecook1000/swift,amraboelela/swift,benlangmuir/swift,xedin/swift,austinzheng/swift,hooman/swift,stephentyrone/swift,shahmishal/swift,allevato/swift,jckarter/swift,practicalswift/swift,sschiau/swift,austinzheng/swift,atrick/swift,tkremenek/swift,jckarter/swift,practicalswift/swift,CodaFi/swift,CodaFi/swift,danielmartin/swift,airspeedswift/swift,karwa/swift,alblue/swift,jmgc/swift,karwa/swift,parkera/swift,tkremenek/swift,devincoughlin/swift,xwu/swift,atrick/swift,shajrawi/swift,brentdax/swift,brentdax/swift,harlanhaskins/swift,gribozavr/swift,danielmartin/swift,jmgc/swift,lorentey/swift,gregomni/swift,practicalswift/swift,shajrawi/swift,CodaFi/swift,airspeedswift/swift,parkera/swift,jmgc/swift,rudkx/swift,amraboelela/swift,lorentey/swift,devincoughlin/swift,xwu/swift,hooman/swift,roambotics/swift,danielmartin/swift,shahmishal/swift,karwa/swift,danielmartin/swift,xwu/swift,xwu/swift,sschiau/swift,sschiau/swift,shajrawi/swift,atrick/swift,glessard/swift,gribozavr/swift,brentdax/swift,rudkx/swift,ahoppen/swift,devincoughlin/swift,harlanhaskins/swift,parkera/swift,glessard/swift,rudkx/swift,harlanhaskins/swift,sschiau/swift,JGiola/swift,gregomni/swift,gribozavr/swift,karwa/swift,practicalswift/swift,airspeedswift/swift,aschwaighofer/swift,brentdax/swift,amraboelela/swift,natecook1000/swift,xedin/swift,jckarter/swift,gregomni/swift,aschwaighofer/swift,alblue/swift,practicalswift/swift,austinzheng/swift,gregomni/swift,sschiau/swift,nathawes/swift,devincoughlin/swift,shahmishal/swift,devincoughlin/swift,allevato/swift,allevato/swift,allevato/swift,amraboelela/swift,roambotics/swift,hooman/swift,ahoppen/swift