IRGen: Call destroyMetadataLayoutMap()
IRGen: Call destroyMetadataLayoutMap()

We added this function but forgot to call it in IRGenModule's destructor
resulting in a leak caught by the leaks bot.

rdar://35116417

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