vendor: update c/common

Signed-off-by: Giuseppe Scrivano <gscrivan@redhat.com>

vendor/github.com/opencontainers/cgroups/fs/net_cls.go

@@ -0,0 +1,31 @@
+package fs
+
+import (
+	"strconv"
+
+	"github.com/opencontainers/cgroups"
+)
+
+type NetClsGroup struct{}
+
+func (s *NetClsGroup) Name() string {
+	return "net_cls"
+}
+
+func (s *NetClsGroup) Apply(path string, _ *cgroups.Resources, pid int) error {
+	return apply(path, pid)
+}
+
+func (s *NetClsGroup) Set(path string, r *cgroups.Resources) error {
+	if r.NetClsClassid != 0 {
+		if err := cgroups.WriteFile(path, "net_cls.classid", strconv.FormatUint(uint64(r.NetClsClassid), 10)); err != nil {
+			return err
+		}
+	}
+
+	return nil
+}
+
+func (s *NetClsGroup) GetStats(path string, stats *cgroups.Stats) error {
+	return nil
+}