oeqa/runtime/cases/parselog.py: ignore a message from weston
The following error message when starting core-image-weston is not
critical as long as the image could start up correctly. So extend
the common_errors list for parselog.py test case to ignore this
message.
logind: cannot setup systemd-logind helper (-61), using legacy fallback
[YOCTO #12835]
Signed-off-by: Chen Qi <Qi.Chen@windriver.com> Signed-off-by: Ross Burton <ross.burton@intel.com>
