acl: fix rules with 8-byte field size

acl: fix rules with 8-byte field size

In theory ACL library allows fields with 8B long.
Though in practice they usually not used, not tested,
and as was revealed by Ido, this functionality is not working properly.
There are few places inside ACL build code-path that need to be addressed.

Bugzilla ID: 673
Fixes: dc276b5780c2 ("acl: new library")
Cc: stable@dpdk.org
Reported-by: Ido Goshen <ido@cgstowernetworks.com>
Signed-off-by: Konstantin Ananyev <konstantin.v.ananyev@yandex.ru>
Tested-by: Ido Goshen <ido@cgstowernetworks.com>