Fixed LCB_CNTL constant which was incorrect defined.

Change-Id: I17a4816d8cb6855e37d372ce942388ee25aabb8f
Reviewed-on: http://review.couchbase.org/34140
Reviewed-by: Mark Nunberg <mnunberg@haskalah.org>
Tested-by: Brett Lawson <brett19@gmail.com>