Add IITDescriptor::VarArg case to DecodeIntrinsicType().
Add IITDescriptor::VarArg case to DecodeIntrinsicType().

LLVM rev r193766 adds this new descriptor kind. Update the switch
to squelch the warning about an unhandled enum value.

Swift SVN r9868

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