SIL: Install a generic context scope in SILFunctionType::substInterfaceGenericArgs.
SIL: Install a generic context scope in SILFunctionType::substInterfaceGenericArgs.

We need to be able to lower the substituted types against the interface types in the context of the SILFunctionType's generic signature.

Swift SVN r11936

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