Remove support for FreeBSD 12.1 from various ports.

FreeBSD 12.1 reached end-of-life today. Adjust the message
for the wine ports while here, since stable/13 has branched.

Submitted by: rene
Reviewed by: jbeich, mandree, mat, osa
Approved by: portmgr (mat)
Differential Revision: https://reviews.freebsd.org/D28406