Fix three tests that weren't checking anything

Add -verify and update the test directives to match current expectations.

Also add a FIXME to an ObjC test that has expected-* directives but no -verify.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@196737 91177308-0d34-0410-b5e6-96231b3b80d8