Bug#610843: debian-installer: keyboard selection does not work with graphical installer

[Samuel Thibault <sthibault@debian.org>]

severity 610843 grave
thanks

> XKBLAYOUT="us"
> -----
> instead of
> -----
> XKBLAYOUT="ch"
> XKBVARIANT="de"

Actually, this is all due to ch(de) not being in xorg.xml any more since
in symbols/ it's just an alias for ch... It's the same with bg(bds) and
se(basic). I'm on it.

Samuel