Use my own libconflate

Change-Id: I738dcb944d48976a1ef0f42310ceb5b10641193c
Reviewed-on: http://review.couchbase.org/29500
Reviewed-by: Trond Norbye <trond.norbye@gmail.com>
Tested-by: Trond Norbye <trond.norbye@gmail.com>