IRGen: Add an "unimplemented" error when trying to call ObjC blocks.
IRGen: Add an "unimplemented" error when trying to call ObjC blocks.

Beats crashing.

Swift SVN r13083

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