tools: example sysvmq audit reader

A user contributed sysvmq audit log example reader. Shows
how to read the sysvmq audit log using core only perl modules.

Reviewed-on: http://gerrit.openafs.org/8485
Tested-by: BuildBot <buildbot@rampaginggeek.com>
Reviewed-by: Derrick Brashear <shadow@your-file-system.com>
(cherry picked from commit 7c8373c8c27abdfa316c6526aa14654caed3e7f8)

Change-Id: Ib2eb66763e6ada884f33f14fbe950759fc9c3c43
Reviewed-on: http://gerrit.openafs.org/9501
Tested-by: BuildBot <buildbot@rampaginggeek.com>
Reviewed-by: Derrick Brashear <shadow@your-file-system.com>
Reviewed-by: Andrew Deason <adeason@sinenomine.net>
Reviewed-by: Stephan Wiesand <stephan.wiesand@desy.de>