Commit 4f193e34 added the test, but screwed up in-tree builds
(SRCDIR=.): the tests's output overwrites the expected output, and is
thus compared to itself.

Cc: qemu-stable@nongnu.org
Reported-by: NLaszlo Ersek <lersek@redhat.com>
Reviewed-by: NAndreas Färber <afaerber@suse.de>
Reviewed-by: NLaszlo Ersek <lersek@redhat.com>
Signed-off-by: NMarkus Armbruster <armbru@redhat.com>
Signed-off-by: NMichael Tokarev <mjt@tls.msk.ru>