Use llvm::MD5::stringifyResult to get a hash string.
Use llvm::MD5::stringifyResult to get a hash string.

llvm r298322 broke the Swift master-next build because it changed MD5Result
to be a struct and not just an array. Rather than a superficial patch to
extract the array, this changes the code to use llvm's stringifyResult
function, which basically addresses one of the FIXMEs in that code.

tjw/swift,parkera/swift,brentdax/swift,hughbe/swift,stephentyrone/swift,zisko/swift,karwa/swift,austinzheng/swift,atrick/swift,milseman/swift,huonw/swift,airspeedswift/swift,xedin/swift,OscarSwanros/swift,stephentyrone/swift,aschwaighofer/swift,xedin/swift,allevato/swift,rudkx/swift,deyton/swift,hughbe/swift,parkera/swift,alblue/swift,jckarter/swift,practicalswift/swift,aschwaighofer/swift,amraboelela/swift,practicalswift/swift,jckarter/swift,CodaFi/swift,benlangmuir/swift,shajrawi/swift,gribozavr/swift,atrick/swift,sschiau/swift,return/swift,ahoppen/swift,harlanhaskins/swift,alblue/swift,parkera/swift,tkremenek/swift,austinzheng/swift,shajrawi/swift,felix91gr/swift,huonw/swift,jtbandes/swift,jmgc/swift,amraboelela/swift,rudkx/swift,danielmartin/swift,CodaFi/swift,hooman/swift,hooman/swift,parkera/swift,gribozavr/swift,xedin/swift,stephentyrone/swift,jopamer/swift,shajrawi/swift,swiftix/swift,jopamer/swift,hughbe/swift,aschwaighofer/swift,codestergit/swift,xwu/swift,devincoughlin/swift,practicalswift/swift,allevato/swift,calebd/swift,frootloops/swift,gregomni/swift,glessard/swift,djwbrown/swift,lorentey/swift,JGiola/swift,zisko/swift,karwa/swift,lorentey/swift,austinzheng/swift,danielmartin/swift,jckarter/swift,felix91gr/swift,bitjammer/swift,uasys/swift,calebd/swift,allevato/swift,swiftix/swift,nathawes/swift,lorentey/swift,xwu/swift,bitjammer/swift,CodaFi/swift,parkera/swift,shahmishal/swift,hooman/swift,codestergit/swift,calebd/swift,swiftix/swift,huonw/swift,uasys/swift,allevato/swift,roambotics/swift,stephentyrone/swift,devincoughlin/swift,austinzheng/swift,gregomni/swift,lorentey/swift,karwa/swift,austinzheng/swift,parkera/swift,danielmartin/swift,arvedviehweger/swift,jopamer/swift,sschiau/swift,hughbe/swift,OscarSwanros/swift,OscarSwanros/swift,arvedviehweger/swift,jtbandes/swift,amraboelela/swift,nathawes/swift,karwa/swift,atrick/swift,apple/swift,devincoughlin/swift,nathawes/swift,swiftix/swift,rudkx/swift,lorentey/swift,glessard/swift,rudkx/swift,tkremenek/swift,hughbe/swift,brentdax/swift,bitjammer/swift,sschiau/swift,felix91gr/swift,jtbandes/swift,deyton/swift,aschwaighofer/swift,OscarSwanros/swift,karwa/swift,uasys/swift,glessard/swift,roambotics/swift,airspeedswift/swift,tinysun212/swift-windows,return/swift,JGiola/swift,hooman/swift,tinysun212/swift-windows,hooman/swift,benlangmuir/swift,atrick/swift,jmgc/swift,JGiola/swift,gregomni/swift,ahoppen/swift,apple/swift,apple/swift,roambotics/swift,return/swift,huonw/swift,tjw/swift,djwbrown/swift,practicalswift/swift,stephentyrone/swift,jmgc/swift,deyton/swift,danielmartin/swift,alblue/swift,return/swift,roambotics/swift,xwu/swift,uasys/swift,gregomni/swift,huonw/swift,brentdax/swift,CodaFi/swift,practicalswift/swift,CodaFi/swift,swiftix/swift,benlangmuir/swift,swiftix/swift,nathawes/swift,lorentey/swift,allevato/swift,CodaFi/swift,hooman/swift,codestergit/swift,karwa/swift,austinzheng/swift,atrick/swift,calebd/swift,tinysun212/swift-windows,frootloops/swift,Jnosh/swift,sschiau/swift,shajrawi/swift,djwbrown/swift,bitjammer/swift,zisko/swift,frootloops/swift,OscarSwanros/swift,frootloops/swift,harlanhaskins/swift,xedin/swift,OscarSwanros/swift,harlanhaskins/swift,glessard/swift,djwbrown/swift,bitjammer/swift,alblue/swift,arvedviehweger/swift,roambotics/swift,tjw/swift,felix91gr/swift,deyton/swift,frootloops/swift,austinzheng/swift,lorentey/swift,amraboelela/swift,arvedviehweger/swift,benlangmuir/swift,jtbandes/swift,natecook1000/swift,deyton/swift,natecook1000/swift,natecook1000/swift,gribozavr/swift,karwa/swift,tkremenek/swift,return/swift,codestergit/swift,hooman/swift,milseman/swift,apple/swift,jopamer/swift,OscarSwanros/swift,jopamer/swift,sschiau/swift,Jnosh/swift,allevato/swift,glessard/swift,felix91gr/swift,tkremenek/swift,glessard/swift,JGiola/swift,return/swift,gribozavr/swift,gribozavr/swift,natecook1000/swift,natecook1000/swift,sschiau/swift,tkremenek/swift,shahmishal/swift,devincoughlin/swift,gribozavr/swift,swiftix/swift,djwbrown/swift,aschwaighofer/swift,jckarter/swift,gregomni/swift,bitjammer/swift,xedin/swift,nathawes/swift,alblue/swift,uasys/swift,apple/swift,amraboelela/swift,shahmishal/swift,JGiola/swift,gribozavr/swift,harlanhaskins/swift,stephentyrone/swift,Jnosh/swift,airspeedswift/swift,felix91gr/swift,gribozavr/swift,allevato/swift,jopamer/swift,tjw/swift,tjw/swift,apple/swift,airspeedswift/swift,tinysun212/swift-windows,sschiau/swift,jtbandes/swift,harlanhaskins/swift,hughbe/swift,jopamer/swift,danielmartin/swift,tkremenek/swift,practicalswift/swift,jmgc/swift,rudkx/swift,roambotics/swift,devincoughlin/swift,zisko/swift,xwu/swift,deyton/swift,tkremenek/swift,devincoughlin/swift,CodaFi/swift,uasys/swift,tinysun212/swift-windows,deyton/swift,airspeedswift/swift,aschwaighofer/swift,huonw/swift,milseman/swift,tinysun212/swift-windows,jckarter/swift,natecook1000/swift,harlanhaskins/swift,brentdax/swift,jmgc/swift,arvedviehweger/swift,nathawes/swift,atrick/swift,brentdax/swift,sschiau/swift,ahoppen/swift,milseman/swift,frootloops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