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/Lexer/digraph.c b/clang/test/Lexer/digraph.c
index 4d494ca..3c92db1 100644
--- a/clang/test/Lexer/digraph.c
+++ b/clang/test/Lexer/digraph.c
@@ -1,6 +1,6 @@
 // RUN: clang-cc -fsyntax-only -verify < %s
 
-%:include <stdio.h>
+%:include <stdint.h>
 
     %:ifndef BUFSIZE
      %:define BUFSIZE  512