Fix up fallout from r187156.

The previous change caused the driver to translate -Wa,-L to the
-msave-temp-labels option for cc1as, but cc1as did not accept that option.
This patch follows the same approach used for similar options (-relax-all,
-noexecstack) in the previous patch.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@191458 91177308-0d34-0410-b5e6-96231b3b80d8
Fix error recovery when a return type correction includes a new name specifier.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@191459 91177308-0d34-0410-b5e6-96231b3b80d8
Remove an unused variable - thanks to Nick Lewycky for pointing this out!

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@191462 91177308-0d34-0410-b5e6-96231b3b80d8
Debug info: Fix a crash when trying to construct a type with redundant
ownership qualifiers.
Fixes rdar://problem/14990656.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@191463 91177308-0d34-0410-b5e6-96231b3b80d8
ObjectiveC migrator: function pointer is not an
inner pointer for annotation to
objc_returns_inner_pointer purposes.
// rdar://15044991


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@191465 91177308-0d34-0410-b5e6-96231b3b80d8