[ms-inline asm] Add the implementation for the AOK_Delete kind, which was added
in r179325.  Test case coming shortly on the clang side.
Part of rdar://13453209

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@179383 91177308-0d34-0410-b5e6-96231b3b80d8