Add a scary warning comment to eliminateSimpleCopies
Add a scary warning comment to eliminateSimpleCopies

We're getting lucky that this utility isn't breaking people's code.

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