KDE4 l10n fixes.
- Remove an entry from all plists that slipped under radar and made
- Properly save the OPTIONS defined by the user in the l10n ports. 
Quoting bapt, master of all things ports:
That is because misc/kde4-l10n/files/bsd.l10n.mk is totally wrong it does
First the right order in that case should be:
Second in that case (kde) the pre.mk/post.mk can be removed just keeping
the options.mk and given that we now have the helpers options.mk can also
The check for variables in OPTIONS_DEFINE is also useless (already done
by the framework) defining OPTIONS_DEFINE and OPTIONS_DEFAULT to some
empty values is also useless.
No PORTREVISION bump because the generated packages do not change regardless
of the changes/fixes in behavior here.
Reported by: avg 
Submitted by: bapt