Fix debian package generation

Change-Id: Ia640c76faac484be8726031550bbb5e80a4db432
Reviewed-on: http://review.couchbase.org/43445
Tested-by: Sergey Avseyev <sergey.avseyev@gmail.com>
Reviewed-by: Dave Rigby <daver@couchbase.com>
Tested-by: Mark Nunberg <mnunberg@haskalah.org>
Reviewed-by: Mark Nunberg <mnunberg@haskalah.org>