[kbd] Rename keymaps to have a unique name

Hello,

we ship several keymaps with identical names. This might lead to the
"wrong" keymap being loaded. Therefore at least Fedora[1] and Gentoo[2]
do the following renames:

mv dvorak/no.map dvorak/no-dvorak.map
mv fgGIod/trf.map fgGIod/trf-fgGIod.map
mv olpc/es.map olpc/es-olpc.map
mv olpc/pt.map olpc/pt-olpc.map
mv qwerty/cz.map qwerty/cz-qwerty.map

Here, the rename of pt.map is not strictly necessary and has only been
done for consistency. The others cover all conflicts.

I think we should rename these files but I'm not sure about some of
the new names. It would be more consistent to name the Norwegian map
dvorak-no.map. cz-qwerty.map looks good. For the rest it does not seem
to matter much whether to use a prefix or suffix.

Felix

[1]: https://bugzilla.redhat.com/show_bug.cgi?id=481674
[2]: https://bugs.gentoo.org/show_bug.cgi?id=293228