Don't distribute generated GDBus bindings for Flatpak portal
Don't distribute generated GDBus bindings for Flatpak portal

Closes: #1618
Approved by: alexlarsson

matthiasclasen/flatpak,matthiasclasen/flatpak,matthiasclasen/flatpak,flatpak/flatpak,matthiasclasen/flatpak,flatpak/flatpak,flatpak/flatpak,flatpak/flatpak,matthiasclasen/flatpak,flatpak/flatpak