libcontainer: fix LinuxFactory comments
libcontainer: fix LinuxFactory comments

Signed-off-by: Iceber Gu <78ca334faffe22661af7aca8231f7bac3769751c@daocloud.io>

estesp/runc,kolyshkin/runc,kolyshkin/runc,dqminh/runc,estesp/runc,opencontainers/runc,opencontainers/runc,dqminh/runc,rhatdan/runc,kolyshkin/runc,rhatdan/runc,kolyshkin/runc,dqminh/runc,dqminh/runc,rhatdan/runc,opencontainers/runc,opencontainers/runc,rhatdan/runc,estesp/runc