One can override an Objective-C ARC ownership qualifier that came from
a template parameter; make that also include one that came from
'auto'. Fixes <rdar://problem/12078752>.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@172770 91177308-0d34-0410-b5e6-96231b3b80d8