stdlib: Don't build ErrorType bridging helpers if there's no ObjC runtime.
stdlib: Don't build ErrorType bridging helpers if there's no ObjC runtime.

Swift SVN r27406

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