Objective-C. Fixes a regression caused by implementation

of new warning for deprecated method call for receiver
of type 'id'. This addresses rdar://18960378 where
unintended warnings being issued.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@221933 91177308-0d34-0410-b5e6-96231b3b80d8