[BuilderTransform] Don't skip multi-statement closures during pre-check
[BuilderTransform] Don't skip multi-statement closures during pre-check

Each of the elements in the result builder has to be fully pre-checked
now that multi-statement inference has been enabled.

benlangmuir/swift,benlangmuir/swift,roambotics/swift,rudkx/swift,roambotics/swift,atrick/swift,atrick/swift,atrick/swift,JGiola/swift,atrick/swift,gregomni/swift,rudkx/swift,JGiola/swift,glessard/swift,roambotics/swift,ahoppen/swift,glessard/swift,apple/swift,apple/swift,benlangmuir/swift,gregomni/swift,JGiola/swift,benlangmuir/swift,benlangmuir/swift,JGiola/swift,gregomni/swift,benlangmuir/swift,rudkx/swift,atrick/swift,rudkx/swift,apple/swift,ahoppen/swift,glessard/swift,apple/swift,apple/swift,ahoppen/swift,glessard/swift,ahoppen/swift,apple/swift,gregomni/swift,glessard/swift,ahoppen/swift,JGiola/swift,rudkx/swift,rudkx/swift,gregomni/swift,JGiola/swift,glessard/swift,atrick/swift,roambotics/swift,roambotics/swift,gregomni/swift,ahoppen/swift,roambotics/swift