Turned no_xform into a pass from expected failure.

Since no_xform is not a bug to be fixed, made the test pass using the 'not'
utility and removed XFAIL.



git-svn-id: https://llvm.org/svn/llvm-project/clang-tools-extra/trunk@176709 91177308-0d34-0410-b5e6-96231b3b80d8