kcmutils_generate_module_data: Fix moc warning in generated files
This fixes the floowing moc warnings:
AutoMoc warning
---------------
"SRC:/build/autotests/module_data_codegen/cursorthemedata.cpp"
includes the moc file "cursorthemedata.moc", but does not contain a Q_OBJECT, Q_GADGET, Q_NAMESPACE, Q_NAMESPACE_EXPORT, K_PLUGIN_FACTORY, K_PLUGIN_FACTORY_WITH_JSON, K_PLUGIN_CLASS_WITH_JSON, K_PLUGIN_FACTORY, K_PLUGIN_FACTORY_WITH_JSON, K_PLUGIN_CLASS_WITH_JSON, K_PLUGIN_FACTORY, K_PLUGIN_FACTORY_WITH_JSON, K_PLUGIN_CLASS_WITH_JSON, K_PLUGIN_FACTORY, K_PLUGIN_FACTORY_WITH_JSON, K_PLUGIN_CLASS_WITH_JSON, K_PLUGIN_FACTORY, K_PLUGIN_FACTORY_WITH_JSON, K_PLUGIN_CLASS_WITH_JSON, K_PLUGIN_FACTORY, K_PLUGIN_FACTORY_WITH_JSON, K_PLUGIN_CLASS_WITH_JSON, K_EXPORT_KPACKAGE_PACKAGE_WITH_JSON or KCMODULECONTAINER macro.
This gets especially annoying in repos where codegen method is used a lot, for example in plasma-workspace.