libxl.c has grown to an uncomfortable size. Carve out the console
related functions (including channels, keyboard and frame buffer)
to libxl_console.c.
Signed-off-by: Juergen Gross <jgross@suse.com>
Reviewed-by: Wei Liu <wei.liu2@citrix.com>
Acked-by: Ian Jackson <ian.jackson@eu.citrix.com>
