Use __objc_nlclslist to force Swift classes to be registered with ObjC.
Use __objc_nlclslist to force Swift classes to be registered with ObjC.

Per Greg's feedback, this variable obviates the need for a static
constructor when the output is compiled. In interpreted mode, we still
initialize the classes by calling +load ourselves.

This is a fix-up for r3949, but we probably still need a better long-term
solution. See <rdar://problem/13154445>.

Swift SVN r3956

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