SIL Linker: Clean up processFunction()
SIL Linker: Clean up processFunction()

Now that addFunctionToWorklist() immediately deserializes,
we can re-use it here.

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