Lazy initialization for policyRoot
Lazy initialization for policyRoot

Initializing policyRoot involves reading and parsing a config file,
and it's not always used, so it's better to only init it when needed.

Signed-off-by: Kir Kolyshkin <3a017b8ddb3f9cf3e4a59978b004111bdeb97f08@gmail.com>

opencontainers/selinux