Use an explicitly 64-bit triple flag to ensure we can easily verify the

types printed in various diagnostics.

We could omit checking for the types, but that can mask errors where the
wrong type is streamed into the diagnostic. There was at least one of
these caught by this test already.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@133429 91177308-0d34-0410-b5e6-96231b3b80d8

test/SemaCXX/null_in_arithmetic_ops.cpp

@@ -1,4 +1,4 @@
-// RUN: %clang_cc1 -fsyntax-only -fblocks -Wnull-arithmetic -verify %s
+// RUN: %clang_cc1 -triple x86_64-unknown-unknown -fsyntax-only -fblocks -Wnull-arithmetic -verify %s
 #include <stddef.h>
 
 void f() {