Get arm_acle tests from r211962 working

llvm-svn: 211979
diff --git a/clang/test/Sema/arm_acle.c b/clang/test/Sema/arm_acle.c
index 0bdbdce2..9a70f85 100644
--- a/clang/test/Sema/arm_acle.c
+++ b/clang/test/Sema/arm_acle.c
@@ -1,4 +1,4 @@
-// RUN: %clang_cc1 -triple armv8 -target-cpu cortex-a57 -fsyntax-only -verify %s
+// RUN: %clang_cc1 -triple armv8 -target-cpu cortex-a57 -fsyntax-only -ffreestanding -verify %s
 
 #include <arm_acle.h>