tests: Use -ffreestanding when including stdint.h, to avoid platform dependencies.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@113301 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/test/Sema/init.c b/test/Sema/init.c
index ac274a4..76f3530 100644
--- a/test/Sema/init.c
+++ b/test/Sema/init.c
@@ -1,4 +1,4 @@
-// RUN: %clang_cc1 %s -verify -fsyntax-only
+// RUN: %clang_cc1 %s -verify -fsyntax-only -ffreestanding
 
 #include <stddef.h>
 #include <stdint.h>