manjaro user is not in autologin group

It seems that manjaro-arm-tools creates autologin group and add user manjaro into that group. See https://gitlab.manjaro.org/manjaro-arm/applications/manjaro-arm-tools/-/blob/master/lib/functions.sh#L394

This code doesn't work anymore for some reason. As consequence we have created following ugly hack: https://github.com/neochapay/nemo-device-dont_be_evil/blob/master/sparse/usr/bin/nemomobile-post-install.sh