ObjectiveC migrator. Fixes an obscure bug where
NS_RETURNS_INNER_POINTER ends up unintentionally 
on the @property under -objcmt-migrate-all 
// rdar://15396636


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@194233 91177308-0d34-0410-b5e6-96231b3b80d8