Fix RPM DB license handling (#1184)

syft/pkg/cataloger/rpmdb/parse_rpmdb.go

@@ -92,6 +92,10 @@ func newPkg(resolver source.FilePathResolver, dbLocation source.Location, entry
 		Metadata:     metadata,
 	}
 
+	if entry.License != "" {
+		p.Licenses = append(p.Licenses, entry.License)
+	}
+
 	p.SetID()
 	return &p, nil
 }

syft/pkg/cataloger/rpmdb/parse_rpmdb_test.go

@@ -75,6 +75,7 @@ func TestParseRpmDB(t *testing.T) {
 					FoundBy:      catalogerName,
 					Type:         pkg.RpmPkg,
 					MetadataType: pkg.RpmdbMetadataType,
+					Licenses:     []string{"MIT"},
 					Metadata: pkg.RpmdbMetadata{
 						Name:      "dive",
 						Epoch:     nil,
@@ -102,6 +103,7 @@ func TestParseRpmDB(t *testing.T) {
 					FoundBy:      catalogerName,
 					Type:         pkg.RpmPkg,
 					MetadataType: pkg.RpmdbMetadataType,
+					Licenses:     []string{"MIT"},
 					Metadata: pkg.RpmdbMetadata{
 						Name:      "dive",
 						Epoch:     nil,