make afsdump_scan get ACLs right

make afsdump_scan get ACLs right

This makes afsdump_scan get the ACLs right on little endian systems.
It also corrects and slightly beautifies some output (indentation,
cut&paste error for negative ACL label).

Reviewed-on: http://gerrit.openafs.org/4494
Reviewed-by: Derrick Brashear <shadow@dementia.org>
Tested-by: Derrick Brashear <shadow@dementia.org>
(cherry picked from commit 1105d63ddf5a32b9381ff47e8101c3f141366fa6)

Change-Id: Iec0fa5bc9673bdce616611f422d74e55b0aa90f1
Reviewed-on: http://gerrit.openafs.org/6292
Reviewed-by: Derrick Brashear <shadow@dementix.org>
Tested-by: Derrick Brashear <shadow@dementix.org>