emulators/wine: Add --old option to pkg32.sh for FreeBSD 15

WoW on FreeBSD is a hack, alas the best option we've got right now.
With FreeBSD 15 dropping 32-bit packages, allow for those from
FreeBSD 14 to be used.

PR: 293073, 291328
Suggested by: Alexander Vereeken <Alexander88207@protonmail.com>