run: Make repos optional (again)

If some installation is empty (or otherwise broken) we fail the
entire run command, even though the app might exist in e.g. the
user installation. This is a regression from
651c86d3c6 which also ended up in 1.0.4.

app/flatpak-builtins-run.c

@@ -112,7 +112,7 @@ flatpak_builtin_run (int argc, char **argv, GCancellable *cancellable, GError **
   g_option_context_add_group (context, flatpak_context_get_options (arg_context));
 
   if (!flatpak_option_context_parse (context, options, &argc, &argv,
-                                     FLATPAK_BUILTIN_FLAG_ALL_DIRS,
+                                     FLATPAK_BUILTIN_FLAG_ALL_DIRS | FLATPAK_BUILTIN_FLAG_OPTIONAL_REPO,
                                      &dirs, cancellable, error))
     return FALSE;