CCBC-350: Add cntl to report changeset used by binary

Change-Id: Ib8240c4d899fdf3f6c4988a52f23ddf2e37def8b
Reviewed-on: http://review.couchbase.org/34898
Reviewed-by: Brett Lawson <brett19@gmail.com>
Tested-by: Mark Nunberg <mnunberg@haskalah.org>