Use my own memcached branch again

Change-Id: I0f1ea033ac98a8baa6ca6ecf4319453a4e5ca307
Reviewed-on: http://review.couchbase.org/29245
Reviewed-by: Trond Norbye <trond.norbye@gmail.com>
Tested-by: Trond Norbye <trond.norbye@gmail.com>