Split sentence in SystemCleanerView.vala

[ghost]

As you have known, split sentences make translators life harder.

It's really impossible to translate them without losing some meanings.

Finished cleaning up %s
with errors!
with no errors

(https://wiki.gnome.org/TranslationProject/DevGuidelines/Never%20split%20sentences)

                ChildWatch.add (child_pid, (pid, status) => {
	                Process.close_pid (pid);
	                result_toast.title = _("Finished cleaning up %s").printf
	                    (got_error ? _("with errors!") : _("with no errors"));
	                result_toast.send_notification ();

Turkish translation of Optimizer quite ready, except this bug.