Update to a newer containers/storage master

Bump containers/storage to master=138cddaf9d6b3910b18de44a017417f60bff4e66

Signed-off-by: Nalin Dahyabhai <nalin@redhat.com>

vendor/github.com/containers/storage/store.go

@@ -370,6 +370,10 @@ type Store interface {
 	// and may have different metadata, big data items, and flags.
 	ImagesByTopLayer(id string) ([]*Image, error)
 
+	// ImagesByDigest returns a list of images which contain a big data item
+	// named ImageDigestBigDataKey whose contents have the specified digest.
+	ImagesByDigest(d digest.Digest) ([]*Image, error)
+
 	// Container returns a specific container.
 	Container(id string) (*Container, error)
 
@@ -2086,6 +2090,33 @@ func (s *store) ImagesByTopLayer(id string) ([]*Image, error) {
 	return images, nil
 }
 
+func (s *store) ImagesByDigest(d digest.Digest) ([]*Image, error) {
+	images := []*Image{}
+
+	istore, err := s.ImageStore()
+	if err != nil {
+		return nil, err
+	}
+
+	istores, err := s.ROImageStores()
+	if err != nil {
+		return nil, err
+	}
+	for _, store := range append([]ROImageStore{istore}, istores...) {
+		store.Lock()
+		defer store.Unlock()
+		if modified, err := store.Modified(); modified || err != nil {
+			store.Load()
+		}
+		imageList, err := store.ByDigest(d)
+		if err != nil && err != ErrImageUnknown {
+			return nil, err
+		}
+		images = append(images, imageList...)
+	}
+	return images, nil
+}
+
 func (s *store) Container(id string) (*Container, error) {
 	rcstore, err := s.ContainerStore()
 	if err != nil {