Bug#402126: GTK frontend should not reload keymap at every frontend_go() call

[Attilio Fiandrotti <attilio.fiandrotti@gmail.com>]

package: cdebconf-gtk-udeb
severity: minor

At every frontend_go() call the GTK frontend forces DirectFB to reload 
keymap: this causes VT1 pollution and is however not really clean.
We should have something like a pipe the GTK frontend should be 
listening on to reload keymap as soon as command from the d-i component 
which manages keymap arrives.

Attilio