CGroups: fix group initialization
CGroups: fix group initialization

Make sure cpuset.cpus and cpuset.mems exist in the parent group before
attempting to copy them to the new group.

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