unicode: Update break_mappings
unicode: Update break_mappings

This will be required for the update to unicode 9.0.0.

https://bugzilla.gnome.org/show_bug.cgi?id=771591

endlessm/glib,johne53/MB3Glib,endlessm/glib,johne53/MB3Glib,johne53/MB3Glib,endlessm/glib,endlessm/glib,endlessm/glib,johne53/MB3Glib,johne53/MB3Glib,johne53/MB3Glib