Packaging support for MacOS X 10.10 "Yosemite"

This is just the packaging part of the patch submitted in the
RT ticket. The configuration part is in the preceding change.

FIXES 131946

Reviewed-on: http://gerrit.openafs.org/11561
Tested-by: BuildBot <buildbot@rampaginggeek.com>
Reviewed-by: Benjamin Kaduk <kaduk@mit.edu>
Reviewed-by: D Brashear <shadow@your-file-system.com>
(cherry picked from commit 8f630226f6f1f73a4d816b72caab3bb1e4620312)

Change-Id: Iea5a295107350e7080278b914badb8b33a5cbc2b
Reviewed-on: http://gerrit.openafs.org/11572
Tested-by: BuildBot <buildbot@rampaginggeek.com>
Reviewed-by: Andrew Deason <adeason@sinenomine.net>
Reviewed-by: Stephan Wiesand <stephan.wiesand@desy.de>