[X86] Use -ffreestanding instead of using the mm_malloc.h include guard hack on more of the builtin tests.

llvm-svn: 315594
diff --git a/clang/test/CodeGen/builtin-clzero.c b/clang/test/CodeGen/builtin-clzero.c
index c9960ce..f9ecb9d 100644
--- a/clang/test/CodeGen/builtin-clzero.c
+++ b/clang/test/CodeGen/builtin-clzero.c
@@ -1,7 +1,7 @@
-// RUN: %clang_cc1 %s -triple=x86_64-apple-darwin -target-feature +clzero  -emit-llvm -o - -Wall -Werror | FileCheck %s
-#define __MM_MALLOC_H
+// RUN: %clang_cc1 %s -ffreestanding -triple=x86_64-apple-darwin -target-feature +clzero  -emit-llvm -o - -Wall -Werror | FileCheck %s
 
 #include <x86intrin.h>
+
 void test_mm_clzero(void * __m) {
   //CHECK-LABEL: @test_mm_clzero
   //CHECK: @llvm.x86.clzero