Packaging support for MacOS X 10.9 "Mavericks".

Based on work originally done by Matt Haught <dmhaught@ncsu.edu>.

Change-Id: Ibc7d79953667dfdfcc2e6c5c1c4c77249f11f4ad
Reviewed-on: http://gerrit.openafs.org/10539
Tested-by: BuildBot <buildbot@rampaginggeek.com>
Reviewed-by: Derrick Brashear <shadow@your-file-system.com>