hopefully fix a bunch of ARM buildbot failures

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@156513 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/test/CodeGen/2008-03-05-syncPtr.c b/test/CodeGen/2008-03-05-syncPtr.c
index 784295c..93f328a 100644
--- a/test/CodeGen/2008-03-05-syncPtr.c
+++ b/test/CodeGen/2008-03-05-syncPtr.c
@@ -1,4 +1,4 @@
-// RUN: %clang_cc1 %s -emit-llvm -o - | FileCheck %s
+// RUN: %clang_cc1 -triple x86_64-apple-darwin %s -emit-llvm -o - | FileCheck %s
 
 int* foo(int** a, int* b, int* c) {
 return __sync_val_compare_and_swap (a, b, c);