Prior to adding the new "expected-no-diagnostics" directive to VerifyDiagnosticConsumer, make the necessary adjustment to 580 test-cases which will henceforth require this new directive.

llvm-svn: 166280
diff --git a/clang/test/CodeGenCXX/member-init-union.cpp b/clang/test/CodeGenCXX/member-init-union.cpp
index 2c50e18..be171a3 100644
--- a/clang/test/CodeGenCXX/member-init-union.cpp
+++ b/clang/test/CodeGenCXX/member-init-union.cpp
@@ -1,4 +1,5 @@
 // RUN: %clang_cc1 %s -emit-llvm-only -verify
+// expected-no-diagnostics
 
 union x {
   int a;