[gardening] Eliminate passing around of SILBuilders.
[gardening] Eliminate passing around of SILBuilders.

This is a bad pattern that we are trying to eliminate from the compiler. On a
side note, this commit also eliminates an unfortunate instance of a raw
SILBuilder!

hooman/swift,jckarter/swift,nathawes/swift,glessard/swift,apple/swift,aschwaighofer/swift,parkera/swift,gregomni/swift,gregomni/swift,harlanhaskins/swift,parkera/swift,roambotics/swift,stephentyrone/swift,glessard/swift,airspeedswift/swift,tkremenek/swift,rudkx/swift,parkera/swift,tkremenek/swift,stephentyrone/swift,apple/swift,harlanhaskins/swift,JGiola/swift,JGiola/swift,xwu/swift,benlangmuir/swift,stephentyrone/swift,jckarter/swift,CodaFi/swift,jmgc/swift,xwu/swift,JGiola/swift,jmgc/swift,airspeedswift/swift,allevato/swift,aschwaighofer/swift,stephentyrone/swift,tkremenek/swift,tkremenek/swift,tkremenek/swift,parkera/swift,apple/swift,atrick/swift,jckarter/swift,roambotics/swift,aschwaighofer/swift,gregomni/swift,atrick/swift,ahoppen/swift,airspeedswift/swift,aschwaighofer/swift,parkera/swift,nathawes/swift,apple/swift,gregomni/swift,jckarter/swift,CodaFi/swift,gregomni/swift,rudkx/swift,rudkx/swift,ahoppen/swift,benlangmuir/swift,xwu/swift,jmgc/swift,CodaFi/swift,jmgc/swift,atrick/swift,parkera/swift,airspeedswift/swift,jmgc/swift,benlangmuir/swift,allevato/swift,ahoppen/swift,jmgc/swift,xwu/swift,allevato/swift,CodaFi/swift,CodaFi/swift,gregomni/swift,tkremenek/swift,harlanhaskins/swift,nathawes/swift,xwu/swift,ahoppen/swift,allevato/swift,airspeedswift/swift,stephentyrone/swift,parkera/swift,airspeedswift/swift,allevato/swift,roambotics/swift,aschwaighofer/swift,jckarter/swift,harlanhaskins/swift,atrick/swift,hooman/swift,rudkx/swift,CodaFi/swift,apple/swift,jckarter/swift,rudkx/swift,aschwaighofer/swift,atrick/swift,CodaFi/swift,glessard/swift,stephentyrone/swift,glessard/swift,ahoppen/swift,allevato/swift,hooman/swift,allevato/swift,JGiola/swift,harlanhaskins/swift,jmgc/swift,hooman/swift,tkremenek/swift,benlangmuir/swift,glessard/swift,aschwaighofer/swift,roambotics/swift,hooman/swift,benlangmuir/swift,nathawes/swift,parkera/swift,benlangmuir/swift,stephentyrone/swift,xwu/swift,glessard/swift,hooman/swift,airspeedswift/swift,harlanhaskins/swift,xwu/swift,roambotics/swift,nathawes/swift,nathawes/swift,jckarter/swift,JGiola/swift,harlanhaskins/swift,JGiola/swift,hooman/swift,roambotics/swift,rudkx/swift,atrick/swift,ahoppen/swift,nathawes/swift,apple/swift