selinux: use openrc contexts path to get contexts
selinux: use openrc contexts path to get contexts

The minimum requirement for libselinux is now >=2.6
The refpolicy and the gentoo policy contain the
contexts since version 2.20170204-r4

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