update c/common

Update containers common to the latest HEAD.  Some bug fixes in libimage
forced us to have a clearer separation between ordinary images and
manifest lists.  Hence, when looking up manifest lists without recursing
into any of their instances, we need to use `LookupManifestList()`.

Also account for some other changes in c/common (e.g., the changed order
in the security labels).

Further vendor the latest HEAD from Buildah which is required to get the
bud tests to pass.

Signed-off-by: Valentin Rothberg <rothberg@redhat.com>

vendor/github.com/containers/common/libimage/save.go

@@ -57,9 +57,13 @@ func (r *Runtime) Save(ctx context.Context, names []string, format, path string,
 	// Dispatch the save operations.
 	switch format {
 	case "oci-archive", "oci-dir", "docker-dir":
+		if len(names) > 1 {
+			return errors.Errorf("%q does not support saving multiple images (%v)", format, names)
+		}
 		return r.saveSingleImage(ctx, names[0], format, path, options)
 
 	case "docker-archive":
+		options.ManifestMIMEType = manifest.DockerV2Schema2MediaType
 		return r.saveDockerArchive(ctx, names, path, options)
 	}
 
@@ -134,6 +138,18 @@ func (r *Runtime) saveDockerArchive(ctx context.Context, names []string, path st
 		tags  []reference.NamedTagged
 	}
 
+	additionalTags := []reference.NamedTagged{}
+	for _, tag := range options.AdditionalTags {
+		named, err := NormalizeName(tag)
+		if err == nil {
+			tagged, withTag := named.(reference.NamedTagged)
+			if !withTag {
+				return errors.Errorf("invalid additional tag %q: normalized to untagged %q", tag, named.String())
+			}
+			additionalTags = append(additionalTags, tagged)
+		}
+	}
+
 	orderedIDs := []string{}                    // to preserve the relative order
 	localImages := make(map[string]*localImage) // to assemble tags
 	visitedNames := make(map[string]bool)       // filters duplicate names
@@ -153,6 +169,7 @@ func (r *Runtime) saveDockerArchive(ctx context.Context, names []string, path st
 		local, exists := localImages[image.ID()]
 		if !exists {
 			local = &localImage{image: image}
+			local.tags = additionalTags
 			orderedIDs = append(orderedIDs, image.ID())
 		}
 		// Add the tag if the locally resolved name is properly tagged