Don't #include <stdio.h> when tests don't need it, or use clang instead of clang-cc when they do.

llvm-svn: 89070
diff --git a/clang/test/Preprocessor/objc-pp.m b/clang/test/Preprocessor/objc-pp.m
index 4ab2f07..977789e 100644
--- a/clang/test/Preprocessor/objc-pp.m
+++ b/clang/test/Preprocessor/objc-pp.m
@@ -1,4 +1,4 @@
 // RUN: clang-cc %s -fsyntax-only -verify -pedantic
 
-#import <limits.h>  // no warning on #import in objc mode.
+#import <stdint.h>  // no warning on #import in objc mode.