trivial: Only run the speed tests when doing the slow self tests
trivial: Only run the speed tests when doing the slow self tests

Fixes: https://github.com/hughsie/appstream-glib/issues/187

ximion/appstream-glib,ximion/appstream-glib,hughsie/appstream-glib,ximion/appstream-glib,hughsie/appstream-glib,hughsie/appstream-glib