Fix multi-SDK build for GLKit.
Fix multi-SDK build for GLKit.

Swift SVN r23898

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