Saving (hopefully) obsolete script to create release tarball

Change-Id: I43f9f2131415b38577a60eb44ca0c1bba54a6404
Reviewed-on: http://review.couchbase.org/39827
Reviewed-by: Chris Hillery <ceej@couchbase.com>
Tested-by: Chris Hillery <ceej@couchbase.com>