[CBD-1191]: Update dashboard for libmemcached and memcached commit validation scripts.

Change-Id: Ied1271d0607c9021f34b83f4e6dd1499059a69b3
Reviewed-on: http://review.couchbase.org/34355
Reviewed-by: Sundararaman Sridharan <sundar.sridharan@gmail.com>
Reviewed-by: Eric Limare <eric.limare@couchbase.com>
Tested-by: Eric Limare <eric.limare@couchbase.com>