Ensure UNICODE keyboard layout is functional in emergency shell

Ensure UNICODE keyboard layout is functional in emergency shell

/lib/udev/cosole_init will load either non-unicode or unicode versions
of keyboard layout for the same value of KEYMAP depending on language
setting. The simplest solution is to install both versions in initrd;
it does not take much space.

While on it, copy some additional maps to ensure emergency shell
has the same keyboard layout as full system.

Signed-off-by: Andrey Borzenkov <arvidjaar@mail.ru>
Signed-off-by: Luca Berra <bluca@vodka.it>