Package build requires cmake

Change-Id: I01d15db5f1e7025fe90a86ee5f7f799913d4b5c9
Reviewed-on: http://review.couchbase.org/43745
Tested-by: Sergey Avseyev <sergey.avseyev@gmail.com>
Reviewed-by: Mark Nunberg <mnunberg@haskalah.org>