Fix the value of `Float80.pi` (#12881)
Fix the value of `Float80.pi` (#12881)

Currently this is implemented as Float80(literal), which gets interpreted as Float80(Double(literal)), unfortunately. Switch to the correct spelling: literal as Float80.

Resolves rdar://problem/35459284
practicalswift/swift,ahoppen/swift,parkera/swift,natecook1000/swift,apple/swift,gribozavr/swift,karwa/swift,devincoughlin/swift,harlanhaskins/swift,gregomni/swift,danielmartin/swift,huonw/swift,sschiau/swift,gribozavr/swift,shahmishal/swift,apple/swift,amraboelela/swift,practicalswift/swift,stephentyrone/swift,devincoughlin/swift,atrick/swift,xwu/swift,shahmishal/swift,karwa/swift,gregomni/swift,parkera/swift,huonw/swift,brentdax/swift,xwu/swift,amraboelela/swift,austinzheng/swift,jckarter/swift,jckarter/swift,allevato/swift,gregomni/swift,devincoughlin/swift,shahmishal/swift,alblue/swift,rudkx/swift,glessard/swift,alblue/swift,glessard/swift,aschwaighofer/swift,ahoppen/swift,sschiau/swift,ahoppen/swift,glessard/swift,frootloops/swift,harlanhaskins/swift,stephentyrone/swift,tjw/swift,hooman/swift,JGiola/swift,brentdax/swift,airspeedswift/swift,xedin/swift,devincoughlin/swift,practicalswift/swift,jmgc/swift,sschiau/swift,airspeedswift/swift,amraboelela/swift,CodaFi/swift,jckarter/swift,airspeedswift/swift,tkremenek/swift,amraboelela/swift,tkremenek/swift,nathawes/swift,jmgc/swift,jckarter/swift,frootloops/swift,brentdax/swift,brentdax/swift,jckarter/swift,allevato/swift,rudkx/swift,allevato/swift,xedin/swift,benlangmuir/swift,lorentey/swift,karwa/swift,shajrawi/swift,benlangmuir/swift,aschwaighofer/swift,lorentey/swift,airspeedswift/swift,CodaFi/swift,jmgc/swift,apple/swift,benlangmuir/swift,danielmartin/swift,CodaFi/swift,parkera/swift,shajrawi/swift,atrick/swift,practicalswift/swift,shahmishal/swift,CodaFi/swift,zisko/swift,jmgc/swift,aschwaighofer/swift,sschiau/swift,austinzheng/swift,sschiau/swift,stephentyrone/swift,apple/swift,allevato/swift,xwu/swift,xedin/swift,practicalswift/swift,amraboelela/swift,tkremenek/swift,gribozavr/swift,tjw/swift,harlanhaskins/swift,jmgc/swift,atrick/swift,karwa/swift,gregomni/swift,hooman/swift,allevato/swift,zisko/swift,frootloops/swift,rudkx/swift,glessard/swift,rudkx/swift,JGiola/swift,lorentey/swift,xwu/swift,ahoppen/swift,tjw/swift,jopamer/swift,frootloops/swift,CodaFi/swift,JGiola/swift,benlangmuir/swift,xwu/swift,jmgc/swift,atrick/swift,JGiola/swift,natecook1000/swift,jopamer/swift,brentdax/swift,parkera/swift,austinzheng/swift,roambotics/swift,tkremenek/swift,natecook1000/swift,harlanhaskins/swift,roambotics/swift,lorentey/swift,tjw/swift,xedin/swift,allevato/swift,benlangmuir/swift,shajrawi/swift,austinzheng/swift,karwa/swift,ahoppen/swift,gregomni/swift,hooman/swift,huonw/swift,zisko/swift,airspeedswift/swift,jckarter/swift,natecook1000/swift,nathawes/swift,jopamer/swift,lorentey/swift,alblue/swift,natecook1000/swift,jopamer/swift,brentdax/swift,jopamer/swift,gribozavr/swift,shajrawi/swift,amraboelela/swift,jmgc/swift,austinzheng/swift,tkremenek/swift,harlanhaskins/swift,CodaFi/swift,frootloops/swift,xedin/swift,glessard/swift,rudkx/swift,harlanhaskins/swift,tjw/swift,lorentey/swift,jckarter/swift,alblue/swift,shajrawi/swift,benlangmuir/swift,shahmishal/swift,karwa/swift,allevato/swift,hooman/swift,devincoughlin/swift,zisko/swift,gribozavr/swift,gribozavr/swift,parkera/swift,practicalswift/swift,karwa/swift,roambotics/swift,gribozavr/swift,brentdax/swift,xedin/swift,aschwaighofer/swift,huonw/swift,austinzheng/swift,jopamer/swift,stephentyrone/swift,xedin/swift,alblue/swift,austinzheng/swift,karwa/swift,apple/swift,hooman/swift,aschwaighofer/swift,nathawes/swift,airspeedswift/swift,shahmishal/swift,alblue/swift,atrick/swift,alblue/swift,parkera/swift,stephentyrone/swift,danielmartin/swift,natecook1000/swift,apple/swift,lorentey/swift,huonw/swift,nathawes/swift,aschwaighofer/swift,aschwaighofer/swift,stephentyrone/swift,parkera/swift,amraboelela/swift,hooman/swift,nathawes/swift,nathawes/swift,airspeedswift/swift,natecook1000/swift,danielmartin/swift,shajrawi/swift,practicalswift/swift,xedin/swift,xwu/swift,rudkx/swift,shajrawi/swift,shahmishal/swift,devincoughlin/swift,zisko/swift,devincoughlin/swift,devincoughlin/swift,hooman/swift,jopamer/swift,sschiau/swift,frootloops/swift,danielmartin/swift,shajrawi/swift,harlanhaskins/swift,glessard/swift,tjw/swift,tkremenek/swift,xwu/swift,roambotics/swift,JGiola/swift,gregomni/swift,danielmartin/swift,JGiola/swift,parkera/swift,ahoppen/swift,atrick/swift,CodaFi/swift,tjw/swift,huonw/swift,shahmishal/swift,nathawes/swift,roambotics/swift,sschiau/swift,danielmartin/swift,tkremenek/swift,frootloops/swift,stephentyrone/swift,zisko/swift,sschiau/swift,gribozavr/swift,practicalswift/swift,lorentey/swift,huonw/swift,roambotics/swift,zisko/swift