IRGen: add swift module metadata into the LLVM module
IRGen: add swift module metadata into the LLVM module

Introduce new named metadata in the LLVM module (swift.module.flags)
that is used to identify if the module is the standard library.  This
will be used to correct the DLL Storage for runtime functions.

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