dns/unbound: Fix packaging with PYTHON option enabled

- Fix packaging with PYTHON option enabled

While I'm here, pet portlint.

PR:		193057
Reported by:	Jaret Bartsch <jaretbartsch at yahoo dot ca>
Reviewed by:	antoine
Approved by:	portmgr (blanket: packaging)


git-svn-id: svn+ssh://svn.freebsd.org/ports/head@366293 35697150-7ecd-e111-bb59-0022644237b5