[ARM] make test checks more thorough; NFC

This will change with the proposal in D60214.
Unfortunately, the triple is not supported for auto-generation
via script, and the multiple RUN lines have diffs on this test,
but I can't tell exactly what is required by this test.
PR7162 was an assert/crash, so hopefully, this is good enough.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@358587 91177308-0d34-0410-b5e6-96231b3b80d8
1 file changed