[master-next] Replace use of F_RW flag that was removed in LLVM r334221
[master-next] Replace use of F_RW flag that was removed in LLVM r334221

Use a combination of the new FA_Read and FA_Write flags instead.

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