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.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@166280 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/test/Parser/knr_parameter_attributes.c b/test/Parser/knr_parameter_attributes.c
index fb975cb..b11a75e 100644
--- a/test/Parser/knr_parameter_attributes.c
+++ b/test/Parser/knr_parameter_attributes.c
@@ -1,4 +1,5 @@
 // RUN: %clang_cc1 -fsyntax-only -W -Wall -Werror -verify %s
+// expected-no-diagnostics
 
 int f(int i __attribute__((__unused__)))
 {