Add `WARN_ON_UNDEFINED_SYMBOLS=0` for the main module (which defines `godot_js_main` as extern coming from the "side" module, i.e. the main Godot binary).
Add `WARN_ON_UNDEFINED_SYMBOLS=0` for the main module (which defines `godot_js_main` as extern coming from the "side" module, i.e. the main Godot binary).