Make another test insensitive to the default C++ dialect.

Differential Revision: http://reviews.llvm.org/D27955


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@290145 91177308-0d34-0410-b5e6-96231b3b80d8

test/CodeGenCXX/arm-swiftcall.cpp

-// RUN: %clang_cc1 -triple armv7-apple-darwin9 -emit-llvm -o - %s -Wno-return-type-c-linkage | FileCheck %s
+// RUN: %clang_cc1 -triple armv7-apple-darwin9 -emit-llvm -o - %s -Wno-return-type-c-linkage -std=c++03 | FileCheck %s -check-prefixes=CHECK
 
 // This isn't really testing anything ARM-specific; it's just a convenient
 // 32-bit platform.