Change test to compile rewritten test with clang++.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@97756 91177308-0d34-0410-b5e6-96231b3b80d8

test/Rewriter/rewrite-byref-vars.mm

@@ -1,4 +1,5 @@
-// RUN: %clang_cc1 -fms-extensions -rewrite-objc -x objective-c++ -fblocks -o - %s
+// RUN: %clang_cc1 -x objective-c++ -Wno-return-type -fblocks -fms-extensions -rewrite-objc %s -o %t-rw.cpp
+// RUN: %clang_cc1 -fsyntax-only -fblocks -Wno-address-of-temporary -D"id=void*" -D"SEL=void*" -D"__declspec(X)=" %t-rw.cpp
 // radar 7540194
 
 extern "C" __declspec(dllexport) void BreakTheRewriter(int i) {