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/SemaObjC/transparent-union.m b/clang/test/SemaObjC/transparent-union.m
index 6f2dbf9..bda0a54 100644
--- a/clang/test/SemaObjC/transparent-union.m
+++ b/clang/test/SemaObjC/transparent-union.m
@@ -1,4 +1,5 @@
 // RUN: %clang_cc1  -fsyntax-only -verify -Wno-objc-root-class %s
+// expected-no-diagnostics
 
 typedef union {
  struct xx_object_s *_do;