stdlib: disable FP80 patterns on Windows (#15588)
stdlib: disable FP80 patterns on Windows (#15588)

Windows does not support FP80 operations even on x86 and x86_64. Disable the generation of those operations on that target.
gribozavr/swift,jopamer/swift,shajrawi/swift,austinzheng/swift,jckarter/swift,apple/swift,apple/swift,danielmartin/swift,alblue/swift,practicalswift/swift,hooman/swift,gregomni/swift,JGiola/swift,aschwaighofer/swift,harlanhaskins/swift,gribozavr/swift,natecook1000/swift,parkera/swift,airspeedswift/swift,devincoughlin/swift,benlangmuir/swift,tkremenek/swift,lorentey/swift,danielmartin/swift,huonw/swift,jmgc/swift,natecook1000/swift,glessard/swift,danielmartin/swift,gregomni/swift,jckarter/swift,tkremenek/swift,jopamer/swift,aschwaighofer/swift,sschiau/swift,xwu/swift,ahoppen/swift,gribozavr/swift,practicalswift/swift,natecook1000/swift,rudkx/swift,nathawes/swift,shajrawi/swift,devincoughlin/swift,benlangmuir/swift,jckarter/swift,allevato/swift,shajrawi/swift,devincoughlin/swift,allevato/swift,jopamer/swift,hooman/swift,brentdax/swift,roambotics/swift,practicalswift/swift,jopamer/swift,sschiau/swift,huonw/swift,airspeedswift/swift,karwa/swift,xedin/swift,CodaFi/swift,practicalswift/swift,lorentey/swift,stephentyrone/swift,natecook1000/swift,austinzheng/swift,tjw/swift,stephentyrone/swift,jckarter/swift,gribozavr/swift,nathawes/swift,tjw/swift,brentdax/swift,devincoughlin/swift,jmgc/swift,airspeedswift/swift,parkera/swift,allevato/swift,gribozavr/swift,jmgc/swift,sschiau/swift,harlanhaskins/swift,shahmishal/swift,xedin/swift,hooman/swift,stephentyrone/swift,apple/swift,austinzheng/swift,devincoughlin/swift,harlanhaskins/swift,karwa/swift,CodaFi/swift,glessard/swift,parkera/swift,shajrawi/swift,roambotics/swift,shajrawi/swift,nathawes/swift,gribozavr/swift,tjw/swift,hooman/swift,atrick/swift,lorentey/swift,nathawes/swift,huonw/swift,JGiola/swift,brentdax/swift,airspeedswift/swift,rudkx/swift,atrick/swift,xwu/swift,stephentyrone/swift,alblue/swift,benlangmuir/swift,parkera/swift,practicalswift/swift,aschwaighofer/swift,atrick/swift,parkera/swift,tkremenek/swift,shahmishal/swift,harlanhaskins/swift,CodaFi/swift,lorentey/swift,amraboelela/swift,nathawes/swift,roambotics/swift,karwa/swift,amraboelela/swift,rudkx/swift,glessard/swift,lorentey/swift,roambotics/swift,parkera/swift,xwu/swift,ahoppen/swift,amraboelela/swift,lorentey/swift,JGiola/swift,austinzheng/swift,apple/swift,xwu/swift,tkremenek/swift,sschiau/swift,CodaFi/swift,xedin/swift,jmgc/swift,aschwaighofer/swift,shajrawi/swift,shahmishal/swift,karwa/swift,jmgc/swift,shahmishal/swift,apple/swift,shahmishal/swift,practicalswift/swift,allevato/swift,tkremenek/swift,apple/swift,danielmartin/swift,gregomni/swift,karwa/swift,devincoughlin/swift,jckarter/swift,allevato/swift,xedin/swift,xedin/swift,gregomni/swift,danielmartin/swift,aschwaighofer/swift,benlangmuir/swift,shajrawi/swift,alblue/swift,nathawes/swift,karwa/swift,sschiau/swift,brentdax/swift,JGiola/swift,ahoppen/swift,huonw/swift,sschiau/swift,airspeedswift/swift,xwu/swift,huonw/swift,tjw/swift,CodaFi/swift,karwa/swift,jopamer/swift,shahmishal/swift,jopamer/swift,brentdax/swift,rudkx/swift,xwu/swift,atrick/swift,shahmishal/swift,JGiola/swift,allevato/swift,airspeedswift/swift,roambotics/swift,austinzheng/swift,natecook1000/swift,atrick/swift,parkera/swift,jmgc/swift,jckarter/swift,harlanhaskins/swift,aschwaighofer/swift,austinzheng/swift,devincoughlin/swift,xedin/swift,shajrawi/swift,tkremenek/swift,glessard/swift,xedin/swift,harlanhaskins/swift,amraboelela/swift,parkera/swift,amraboelela/swift,ahoppen/swift,tjw/swift,aschwaighofer/swift,roambotics/swift,rudkx/swift,CodaFi/swift,austinzheng/swift,stephentyrone/swift,ahoppen/swift,practicalswift/swift,airspeedswift/swift,glessard/swift,nathawes/swift,alblue/swift,stephentyrone/swift,huonw/swift,jckarter/swift,sschiau/swift,devincoughlin/swift,alblue/swift,sschiau/swift,xwu/swift,gribozavr/swift,brentdax/swift,lorentey/swift,huonw/swift,benlangmuir/swift,natecook1000/swift,stephentyrone/swift,allevato/swift,hooman/swift,lorentey/swift,alblue/swift,ahoppen/swift,CodaFi/swift,JGiola/swift,jmgc/swift,natecook1000/swift,rudkx/swift,danielmartin/swift,xedin/swift,tjw/swift,tkremenek/swift,jopamer/swift,benlangmuir/swift,glessard/swift,danielmartin/swift,amraboelela/swift,hooman/swift,gregomni/swift,harlanhaskins/swift,tjw/swift,atrick/swift,shahmishal/swift,gregomni/swift,gribozavr/swift,practicalswift/swift,alblue/swift,karwa/swift,hooman/swift,brentdax/swift,amraboelela/swift