Update to c/image v4.0.1

Update to use the correct c/image/v4 import path, work originally from
https://github.com/containers/skopeo/pull/733 by Valentin Rothberg <rothberg@redhat.com>.

Signed-off-by: Miloslav Trmač <mitr@redhat.com>

vendor/github.com/containers/storage/drivers/windows/windows.go

@@ -372,7 +372,15 @@ func (d *Driver) Get(id string, options graphdriver.MountOpts) (string, error) {
 	logrus.Debugf("WindowsGraphDriver Get() id %s mountLabel %s", id, options.MountLabel)
 	var dir string
 
-	if len(options.Options) > 0 {
+	switch len(options.Options) {
+	case 0:
+	case 1:
+		if options.Options[0] == "ro" {
+			// ignore "ro" option
+			break
+		}
+		fallthrough
+	default:
 		return "", fmt.Errorf("windows driver does not support mount options")
 	}
 	rID, err := d.resolveID(id)