builder-manifest: run appstream compose with --no-partial-urls

Only when mirroring. This is to be compatible with existing flatpak
deployment and appstream-glib

See ximion/appstream#505

Should fix #573

Signed-off-by: Hubert Figuière <[email protected]>

Author: hfiguiere

src/builder-manifest.c

@@ -3033,6 +3033,7 @@ builder_manifest_cleanup (BuilderManifest *self,
               g_print ("Running appstreamcli compose\n");
               g_print ("Saving screenshots in %s\n", flatpak_file_get_path_cached (media_dir));
               if (!appstreamcli_compose (error,
+                                         "--no-partial-urls",
                                          "--prefix=/",
                                          origin,
                                          arg_base_url,