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/Analysis/cstring-syntax-cxx.cpp b/clang/test/Analysis/cstring-syntax-cxx.cpp
index f8975ab..bae3d0a 100644
--- a/clang/test/Analysis/cstring-syntax-cxx.cpp
+++ b/clang/test/Analysis/cstring-syntax-cxx.cpp
@@ -1,4 +1,5 @@
 // RUN: %clang_cc1 -analyze -analyzer-checker=unix.cstring.BadSizeArg -analyzer-store=region -verify %s
+// expected-no-diagnostics
 
 // Ensure we don't crash on C++ declarations with special names.
 struct X {