Don't include cpack

Change-Id: I632a6ca147a06c9b2a986c33c05f63b011a76e33
Reviewed-on: http://review.couchbase.org/35365
Reviewed-by: Trond Norbye <trond.norbye@gmail.com>
Tested-by: Trond Norbye <trond.norbye@gmail.com>