loader: Print OSv version info correctly

On VBOX and VMW, the version info is not printed correctly.
Fix it by only print after our console is initialized.

Reviewed-by: Nadav Har'El <nyh@cloudius-systems.com>
Signed-off-by: Asias He <asias@cloudius-systems.com>
Signed-off-by: Pekka Enberg <penberg@cloudius-systems.com>