master-next: fix build for mapped_iterator change in LLVM r317902
master-next: fix build for mapped_iterator change in LLVM r317902

The default template parameter assumes that the iterator type is a pointer,
which it is not for SILInstructionResultArray. Just specify the return
type directly instead of using the default.

devincoughlin/swift,apple/swift,stephentyrone/swift,parkera/swift,jopamer/swift,tkremenek/swift,practicalswift/swift,stephentyrone/swift,brentdax/swift,devincoughlin/swift,airspeedswift/swift,hooman/swift,austinzheng/swift,natecook1000/swift,practicalswift/swift,stephentyrone/swift,brentdax/swift,JGiola/swift,allevato/swift,practicalswift/swift,huonw/swift,jckarter/swift,CodaFi/swift,atrick/swift,rudkx/swift,roambotics/swift,austinzheng/swift,roambotics/swift,benlangmuir/swift,xedin/swift,shahmishal/swift,lorentey/swift,lorentey/swift,jckarter/swift,austinzheng/swift,hooman/swift,xwu/swift,jopamer/swift,lorentey/swift,sschiau/swift,amraboelela/swift,JGiola/swift,xwu/swift,xedin/swift,karwa/swift,stephentyrone/swift,parkera/swift,CodaFi/swift,danielmartin/swift,rudkx/swift,danielmartin/swift,tkremenek/swift,lorentey/swift,stephentyrone/swift,practicalswift/swift,natecook1000/swift,parkera/swift,shahmishal/swift,amraboelela/swift,lorentey/swift,austinzheng/swift,harlanhaskins/swift,brentdax/swift,sschiau/swift,amraboelela/swift,huonw/swift,nathawes/swift,shajrawi/swift,devincoughlin/swift,glessard/swift,xedin/swift,shajrawi/swift,roambotics/swift,xedin/swift,nathawes/swift,jckarter/swift,lorentey/swift,danielmartin/swift,practicalswift/swift,atrick/swift,jopamer/swift,karwa/swift,allevato/swift,shahmishal/swift,sschiau/swift,xedin/swift,harlanhaskins/swift,tkremenek/swift,shahmishal/swift,alblue/swift,harlanhaskins/swift,allevato/swift,apple/swift,gribozavr/swift,stephentyrone/swift,tjw/swift,JGiola/swift,jmgc/swift,jopamer/swift,aschwaighofer/swift,aschwaighofer/swift,shajrawi/swift,nathawes/swift,shajrawi/swift,natecook1000/swift,aschwaighofer/swift,benlangmuir/swift,glessard/swift,aschwaighofer/swift,jmgc/swift,parkera/swift,sschiau/swift,rudkx/swift,alblue/swift,tkremenek/swift,hooman/swift,ahoppen/swift,gribozavr/swift,gribozavr/swift,airspeedswift/swift,xedin/swift,JGiola/swift,natecook1000/swift,tjw/swift,glessard/swift,amraboelela/swift,gregomni/swift,apple/swift,amraboelela/swift,gribozavr/swift,xedin/swift,JGiola/swift,danielmartin/swift,jckarter/swift,devincoughlin/swift,shajrawi/swift,harlanhaskins/swift,ahoppen/swift,ahoppen/swift,xwu/swift,harlanhaskins/swift,devincoughlin/swift,atrick/swift,natecook1000/swift,gregomni/swift,gribozavr/swift,natecook1000/swift,harlanhaskins/swift,aschwaighofer/swift,benlangmuir/swift,nathawes/swift,amraboelela/swift,huonw/swift,shahmishal/swift,alblue/swift,parkera/swift,devincoughlin/swift,aschwaighofer/swift,roambotics/swift,apple/swift,tkremenek/swift,airspeedswift/swift,brentdax/swift,CodaFi/swift,jmgc/swift,danielmartin/swift,devincoughlin/swift,devincoughlin/swift,glessard/swift,tjw/swift,xwu/swift,harlanhaskins/swift,ahoppen/swift,xedin/swift,brentdax/swift,CodaFi/swift,jopamer/swift,austinzheng/swift,alblue/swift,jmgc/swift,jmgc/swift,roambotics/swift,ahoppen/swift,lorentey/swift,hooman/swift,xwu/swift,karwa/swift,practicalswift/swift,gregomni/swift,gregomni/swift,rudkx/swift,shajrawi/swift,nathawes/swift,gregomni/swift,jopamer/swift,shahmishal/swift,xwu/swift,shajrawi/swift,karwa/swift,parkera/swift,practicalswift/swift,alblue/swift,atrick/swift,karwa/swift,xwu/swift,atrick/swift,CodaFi/swift,sschiau/swift,rudkx/swift,jckarter/swift,tjw/swift,allevato/swift,huonw/swift,karwa/swift,airspeedswift/swift,tjw/swift,huonw/swift,lorentey/swift,gregomni/swift,airspeedswift/swift,atrick/swift,karwa/swift,danielmartin/swift,parkera/swift,jmgc/swift,austinzheng/swift,hooman/swift,hooman/swift,glessard/swift,CodaFi/swift,apple/swift,shajrawi/swift,sschiau/swift,tjw/swift,roambotics/swift,allevato/swift,practicalswift/swift,stephentyrone/swift,huonw/swift,tkremenek/swift,alblue/swift,shahmishal/swift,aschwaighofer/swift,allevato/swift,apple/swift,nathawes/swift,sschiau/swift,alblue/swift,JGiola/swift,ahoppen/swift,benlangmuir/swift,natecook1000/swift,allevato/swift,hooman/swift,sschiau/swift,glessard/swift,CodaFi/swift,benlangmuir/swift,huonw/swift,karwa/swift,danielmartin/swift,austinzheng/swift,jmgc/swift,benlangmuir/swift,parkera/swift,gribozavr/swift,brentdax/swift,brentdax/swift,jopamer/swift,tjw/swift,shahmishal/swift,gribozavr/swift,gribozavr/swift,rudkx/swift,airspeedswift/swift,nathawes/swift,amraboelela/swift,jckarter/swift,tkremenek/swift,airspeedswift/swift,jckarter/swift