multimedia/mkclean: Upgrade to 0.9.0

From: T M <sega01_at_go-beyond.org>
Date: Wed, 23 Feb 2022 15:00:38 UTC
Hi,

multimedia/mkclean does not have a maintainer. I'm not sure if I
can be a maintainer at the moment, but I did come up with a patch
to upgrade the port. I'm not very experienced with ports, so I hope
I did it properly.

Could someone take a look at this?

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=262041

Thank you.