Try even harder to register Utils::CommandLine and FilePath

Amends a460fa3152.

Change-Id: Id251c6ead6ca31020a3d990028a4ceac11bdac25
Reviewed-by: Eike Ziller <eike.ziller@qt.io>

src/plugins/coreplugin/coreplugin.cpp

@@ -80,6 +80,8 @@ CorePlugin::CorePlugin()
 {
     qRegisterMetaType<Id>();
     qRegisterMetaType<Core::Search::TextPosition>();
+    qRegisterMetaType<Utils::CommandLine>();
+    qRegisterMetaType<Utils::FilePath>();
     m_instance = this;
 }