scripts/cpu-x86-uarch-abi.py: use .command() instead of .cmd()

Here we don't expect a failure. In case of failure we'll crash on
trying to access ['return']. Better is to use .command() that clearly
raises on failure.

Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@yandex-team.ru>
Reviewed-by: Eric Blake <eblake@redhat.com>
Message-id: 20231006154125.1068348-4-vsementsov@yandex-team.ru
Signed-off-by: John Snow <jsnow@redhat.com>
1 file changed