Squashed repositories

libmemcached is part of moxi
portsigar is part of sigar

Change-Id: I783326fb75bfe2b1487ef4a94704a77428e9ad8d
Reviewed-on: http://review.couchbase.org/34781
Reviewed-by: Chris Hillery <ceej@couchbase.com>
Tested-by: Chris Hillery <ceej@couchbase.com>