print/gutenprint: update to 5.2.14

Changelog: https://sourceforge.net/p/gimp-print/mailman/message/36300478/

While here, remove cups-genppd symlink (added in ports r465457) again.
The symlink is not being provided by upstream, and it's not expected
that users use this tool anyway (most of those who do are following
outdated documentation). (Noted by tijl@)