Treat AnyObject conformance for an archetype or existential specially.
Treat AnyObject conformance for an archetype or existential specially.

These types may not have a conformance for AnyObject explicitly declared,
but being class-bound in some other way is good enough.

<rdar://problem/16818324>

Swift SVN r17581

natecook1000/swift,therealbnut/swift,sschiau/swift,MukeshKumarS/Swift,LeoShimonaka/swift,tardieu/swift,atrick/swift,lorentey/swift,tinysun212/swift-windows,SwiftAndroid/swift,hughbe/swift,stephentyrone/swift,cbrentharris/swift,amraboelela/swift,swiftix/swift,SwiftAndroid/swift,gregomni/swift,airspeedswift/swift,johnno1962d/swift,SwiftAndroid/swift,khizkhiz/swift,bitjammer/swift,KrishMunot/swift,sschiau/swift,manavgabhawala/swift,LeoShimonaka/swift,khizkhiz/swift,austinzheng/swift,CodaFi/swift,codestergit/swift,MukeshKumarS/Swift,tardieu/swift,modocache/swift,kentya6/swift,khizkhiz/swift,bitjammer/swift,xedin/swift,amraboelela/swift,benlangmuir/swift,OscarSwanros/swift,sdulal/swift,gottesmm/swift,austinzheng/swift,djwbrown/swift,airspeedswift/swift,codestergit/swift,gregomni/swift,danielmartin/swift,stephentyrone/swift,apple/swift,roambotics/swift,gribozavr/swift,arvedviehweger/swift,cbrentharris/swift,MukeshKumarS/Swift,russbishop/swift,ken0nek/swift,austinzheng/swift,jckarter/swift,Ivacker/swift,atrick/swift,kentya6/swift,jckarter/swift,emilstahl/swift,bitjammer/swift,Ivacker/swift,djwbrown/swift,IngmarStein/swift,practicalswift/swift,xwu/swift,MukeshKumarS/Swift,natecook1000/swift,roambotics/swift,Jnosh/swift,practicalswift/swift,stephentyrone/swift,cbrentharris/swift,modocache/swift,milseman/swift,SwiftAndroid/swift,IngmarStein/swift,rudkx/swift,jopamer/swift,uasys/swift,shajrawi/swift,hooman/swift,atrick/swift,swiftix/swift.old,djwbrown/swift,aschwaighofer/swift,CodaFi/swift,stephentyrone/swift,jmgc/swift,emilstahl/swift,JaSpa/swift,devincoughlin/swift,jckarter/swift,huonw/swift,swiftix/swift.old,milseman/swift,parkera/swift,parkera/swift,adrfer/swift,modocache/swift,frootloops/swift,alblue/swift,ben-ng/swift,jopamer/swift,milseman/swift,practicalswift/swift,huonw/swift,slavapestov/swift,mightydeveloper/swift,zisko/swift,ahoppen/swift,parkera/swift,dreamsxin/swift,milseman/swift,danielmartin/swift,KrishMunot/swift,JGiola/swift,Ivacker/swift,danielmartin/swift,gribozavr/swift,xwu/swift,brentdax/swift,slavapestov/swift,aschwaighofer/swift,milseman/swift,gmilos/swift,uasys/swift,jtbandes/swift,JaSpa/swift,JGiola/swift,xedin/swift,LeoShimonaka/swift,ahoppen/swift,IngmarStein/swift,lorentey/swift,tjw/swift,felix91gr/swift,calebd/swift,xedin/swift,gottesmm/swift,arvedviehweger/swift,stephentyrone/swift,djwbrown/swift,brentdax/swift,stephentyrone/swift,xedin/swift,harlanhaskins/swift,shahmishal/swift,swiftix/swift,swiftix/swift,rudkx/swift,practicalswift/swift,parkera/swift,nathawes/swift,russbishop/swift,jmgc/swift,uasys/swift,aschwaighofer/swift,felix91gr/swift,therealbnut/swift,shajrawi/swift,kusl/swift,sschiau/swift,lorentey/swift,cbrentharris/swift,gmilos/swift,zisko/swift,nathawes/swift,apple/swift,sdulal/swift,ben-ng/swift,gribozavr/swift,huonw/swift,swiftix/swift.old,Ivacker/swift,zisko/swift,aschwaighofer/swift,swiftix/swift.old,dduan/swift,codestergit/swift,sschiau/swift,kperryua/swift,felix91gr/swift,gregomni/swift,gmilos/swift,danielmartin/swift,bitjammer/swift,jtbandes/swift,lorentey/swift,uasys/swift,felix91gr/swift,cbrentharris/swift,swiftix/swift,parkera/swift,shahmishal/swift,karwa/swift,codestergit/swift,Ivacker/swift,gottesmm/swift,JGiola/swift,ken0nek/swift,djwbrown/swift,tkremenek/swift,tjw/swift,russbishop/swift,JGiola/swift,kusl/swift,emilstahl/swift,ken0nek/swift,kperryua/swift,OscarSwanros/swift,tinysun212/swift-windows,khizkhiz/swift,MukeshKumarS/Swift,harlanhaskins/swift,CodaFi/swift,frootloops/swift,shajrawi/swift,kperryua/swift,xwu/swift,kperryua/swift,apple/swift,harlanhaskins/swift,mightydeveloper/swift,JaSpa/swift,deyton/swift,rudkx/swift,tardieu/swift,IngmarStein/swift,dreamsxin/swift,jopamer/swift,gottesmm/swift,aschwaighofer/swift,brentdax/swift,karwa/swift,rudkx/swift,deyton/swift,dduan/swift,austinzheng/swift,apple/swift,emilstahl/swift,austinzheng/swift,Ivacker/swift,JGiola/swift,jmgc/swift,kentya6/swift,benlangmuir/swift,CodaFi/swift,khizkhiz/swift,kstaring/swift,JaSpa/swift,uasys/swift,austinzheng/swift,slavapestov/swift,jopamer/swift,alblue/swift,sschiau/swift,hooman/swift,dduan/swift,zisko/swift,allevato/swift,LeoShimonaka/swift,jmgc/swift,adrfer/swift,gribozavr/swift,johnno1962d/swift,parkera/swift,calebd/swift,IngmarStein/swift,alblue/swift,kusl/swift,xwu/swift,modocache/swift,hughbe/swift,adrfer/swift,shajrawi/swift,JaSpa/swift,sdulal/swift,xedin/swift,dduan/swift,return/swift,sschiau/swift,mightydeveloper/swift,danielmartin/swift,IngmarStein/swift,kstaring/swift,modocache/swift,Jnosh/swift,Ivacker/swift,SwiftAndroid/swift,alblue/swift,LeoShimonaka/swift,apple/swift,harlanhaskins/swift,hooman/swift,glessard/swift,austinzheng/swift,zisko/swift,kentya6/swift,amraboelela/swift,jckarter/swift,emilstahl/swift,brentdax/swift,KrishMunot/swift,tjw/swift,LeoShimonaka/swift,LeoShimonaka/swift,jckarter/swift,dduan/swift,calebd/swift,kusl/swift,arvedviehweger/swift,alblue/swift,ben-ng/swift,kentya6/swift,kstaring/swift,KrishMunot/swift,parkera/swift,tardieu/swift,frootloops/swi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