[arch-releng] Add basic keyboard remap in syslinux menu.

[Gerardo Exequiel Pozzi]

Hello

What do you think about this? Is not perfect, but at least can make more 
people happy.

* A simple demo script that can be added to syslinux-iso profile.
* Needs lilo (for keytab-lilo perl script) and kdb (for keymaps)
* Some keymaps require unicode support, otherwise will fail. So maybe 
(if this is implemented) lilo can als provide a keymap-lilo-unicode 
(below is how this can be generated)
* Each keymap file takes only 256 bytes.
* The script is here: https://gist.github.com/714822

A much better keymap support is using gfxboot.c32, but this is another 
history ;)

I motivated by this feature request: https://bugs.archlinux.org/task/21725

-- 
Gerardo Exequiel Pozzi
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