Update vendor

vendor/github.com/docker/containerd/supervisor/checkpoint.go

@@ -0,0 +1,33 @@
+// +build !windows
+
+package supervisor
+
+import "github.com/docker/containerd/runtime"
+
+type CreateCheckpointTask struct {
+	baseTask
+	ID         string
+	Checkpoint *runtime.Checkpoint
+}
+
+func (s *Supervisor) createCheckpoint(t *CreateCheckpointTask) error {
+	i, ok := s.containers[t.ID]
+	if !ok {
+		return ErrContainerNotFound
+	}
+	return i.container.Checkpoint(*t.Checkpoint)
+}
+
+type DeleteCheckpointTask struct {
+	baseTask
+	ID         string
+	Checkpoint *runtime.Checkpoint
+}
+
+func (s *Supervisor) deleteCheckpoint(t *DeleteCheckpointTask) error {
+	i, ok := s.containers[t.ID]
+	if !ok {
+		return ErrContainerNotFound
+	}
+	return i.container.DeleteCheckpoint(t.Checkpoint.Name)
+}