ObjectiveC migrator. Minor clean up of my last patch.
No functional change.


git-svn-id: http://llvm.org/svn/llvm-project/cfe/trunk@192933 91177308-0d34-0410-b5e6-96231b3b80d8
Consumed analysis: Add param_typestate attribute, which specifies that
function parameters must be in a particular state.  Patch by
chris.wailes@gmail.com.  Reviewed by delesley@google.com.

git-svn-id: http://llvm.org/svn/llvm-project/cfe/trunk@192934 91177308-0d34-0410-b5e6-96231b3b80d8