AArch64: add test for updated __clear_cache definition

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@181765 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/test/Sema/builtins-aarch64.c b/test/Sema/builtins-aarch64.c
index 03e0334..cc2a154 100644
--- a/test/Sema/builtins-aarch64.c
+++ b/test/Sema/builtins-aarch64.c
@@ -1,4 +1,9 @@
 // RUN: %clang_cc1 -triple aarch64-none-linux-gnu -fsyntax-only -verify %s
+// RUN: %clang_cc1 -triple aarch64-none-linux-gnu -DTEST1 -fsyntax-only -verify %s
+
+#ifdef TEST1
+void __clear_cache(char *start, char *end);
+#endif
 
 void test_clear_cache_chars(char *start, char *end) {
   __clear_cache(start, end);