Switch XFAIL format to match LLVM.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@85880 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/test/SemaObjCXX/overload.mm b/test/SemaObjCXX/overload.mm
index 4714100..56dc510 100644
--- a/test/SemaObjCXX/overload.mm
+++ b/test/SemaObjCXX/overload.mm
@@ -1,5 +1,5 @@
 // RUN: clang-cc -fsyntax-only -verify %s
-// XFAIL
+// XFAIL: *
 @interface Foo
 @end