ARM MachO embedded: fix test without FileCheck line

Well, that's one way to pass a test, I suppose. Unfortunately actually doing
the testing means I didn't pass all I thought (embedded v7a is not supported,
apparently). I'll deal with that with the move to -none-macho rather than
putting heinous hacks in right now.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@197240 91177308-0d34-0410-b5e6-96231b3b80d8