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/SemaCXX/pragma-unused.cpp b/clang/test/SemaCXX/pragma-unused.cpp
index c9ddffa..c9eaab6 100644
--- a/clang/test/SemaCXX/pragma-unused.cpp
+++ b/clang/test/SemaCXX/pragma-unused.cpp
@@ -1,4 +1,5 @@
 // RUN: %clang_cc1 -fsyntax-only -Wunused-parameter -Wunused -verify %s
+// expected-no-diagnostics
 
 struct S {
   void m(int x, int y) {