s390x: test for various MSA instructions

Test the parameter checks and if the query function correctly works.

Tests will only be executed if the corresponding stfl(e) bit for an
instruction is indicated.

Signed-off-by: David Hildenbrand <david@redhat.com>
Message-Id: <20170919145033.16959-6-david@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>