bootmisc: Don't call dmesg in systemd-nspawn containers
bootmisc: Don't call dmesg in systemd-nspawn containers

This fixes #57.

dwfreed/openrc,dwfreed/openrc,OpenRC/openrc,williamh/openrc,OpenRC/openrc,dwfreed/openrc,williamh/openrc,williamh/openrc,OpenRC/openrc