x11/cde-25: Introduce the new x11/cde-25

CDE 2.5.0 has many improvements however some users may discover that
fonts used by legacy Xm and Xaw apps are unreadable due to legacy apps
using the gb2312.1980 font registry. For now cde-24 will remain the
default cde however users can install cde-25 for new features and
bugfixes.