This adds dma-buf feedback support for EGL Wayland.
It is based on !4460 (closed) and should take over it.
- Wayland MR: wayland/wayland-protocols!8 (merged)
- wlroots MR: wlroots/wlroots!1376 (merged)
- Weston MR: wayland/weston!544 (merged)
Depends on: drm!129 (merged)