In non-gc, non-arc mode, property of 'Class' type

variety is treated as a 'void *'. No need to issue
warning reserved for objc object properties.
// rdar://10565506


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@147504 91177308-0d34-0410-b5e6-96231b3b80d8