x11-wm/gamescope: restore hwdata dependency after 146bb4da8d31

gamescope uses pkg-config to get pnp.ids location (like wlroots)
but parses it at runtime (unlike wlroots).
https://github.com/Plagman/gamescope/commit/5fca0702ab2c
https://github.com/Plagman/gamescope/commit/f4a33bd37e49