utils: qemurunner.py: Log both 'failed to reach login banner" reasons
The current logging always assumes the boot timeout has expired yet
there is a second reason we might have ended up in a position where no
login banner was found, that being a socket disconnect. Add logging
for the disconnect case and make the timeout expiration conditional on
the timeout being exhausted.
Signed-off-by: Mark Asselstine <mark.asselstine@windriver.com> Signed-off-by: Ross Burton <ross.burton@intel.com>
