Update due to refactor of memcached_ntohll

Change-Id: Ib657c2f5813a2ea7ab33d86c9407a96b23e39be9
Reviewed-on: http://review.couchbase.org/29241
Reviewed-by: Trond Norbye <trond.norbye@gmail.com>
Tested-by: Trond Norbye <trond.norbye@gmail.com>