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/Lexer/clang-keywords.cpp b/clang/test/Lexer/clang-keywords.cpp
index a349b44..3a24dce 100644
--- a/clang/test/Lexer/clang-keywords.cpp
+++ b/clang/test/Lexer/clang-keywords.cpp
@@ -1,3 +1,4 @@
 // RUN: %clang_cc1 -fsyntax-only -verify %s
+// expected-no-diagnostics
 __char16_t c16;
 void f(__char32_t) { }