selinux: fix const qualifier warning
selinux: fix const qualifier warning

rc-selinux.c: In function ‘selinux_setup’:
rc-selinux.c:361:9: warning: assignment discards ‘const’ qualifier from pointer target type [-Wdiscarded-qualifiers]
  curr_t = context_type_get(curr_con);
         ^

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