[NFC] Inliner: throw blocks borrows end the same.
[NFC] Inliner: throw blocks borrows end the same.

Previously, the SILInliner had a few lines of special-case code to
handle adding end_borrow instructions to the throw block corresponding
to a try_apply instruction.  Because there's a mechanism for tracking
all places where these end_borrows need to be inserted, just use that
mechanism rather than having a special case for the throw block.

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