Tweak text_console_login match area
    
    On Rawhide Cloud_Base boots, there's some SSH key and network
    information printed above the 'login:' prompt, so we can't
    expect empty space there. Let's just hope not looking for the
    empty space doesn't break anything else.
    
    https://openqa.fedoraproject.org/tests/489003#step/_console_wait_login/7
    
    Signed-off-by: Adam Williamson <awilliam@redhat.com>