Sema: Fix assertion failure in switch sema.
Sema: Fix assertion failure in switch sema.

Put the fake source location for a case condition's implicit reference to the subject variable at the start of the actual source location of the case condition, so that the source range of the enclosing TupleExpr properly encloses its child nodes.

Swift SVN r4857

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