Fix root prompt detection

With latest 5.4 kernel there's a message with a '# ' in it (pci 0000:00:00.0: PME# supported from D0 D1 D3hot D3cold) which is detected by Lava as a prompt and triggers send of the username before login prompt appeared.

Adding a space in front of # fixes it.

Signed-off-by: Frédéric Danis frederic.danis@collabora.com