Bug#882666: "*.libretro" key/value files are missing

[Patrick Ammann]

Still an issue with version "3.30.0-1"

Looks like "*.libretro" key/value files are missing in the installation 
path "/usr/lib/x86_64-linux-gnu/libretro"

When i add files like found here manually (e.g. nestopia.libretro) it 
starts to work:
https://gitlab.gnome.org/GNOME/gnome-games/tree/master/flatpak/libretro-cores

libretro-gtk depends on those files (see file: retro-module-iterator.c 
function:retro_module_iterator_iterate_next_in_current_path)

Thanks,
Patrick