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/Preprocessor/objc-pp.m b/clang/test/Preprocessor/objc-pp.m
index 0ec288c..3522f73 100644
--- a/clang/test/Preprocessor/objc-pp.m
+++ b/clang/test/Preprocessor/objc-pp.m
@@ -1,4 +1,5 @@
 // RUN: %clang_cc1 %s -fsyntax-only -verify -pedantic -ffreestanding
+// expected-no-diagnostics
 
 #import <stdint.h>  // no warning on #import in objc mode.