core-deps-latest: Build GstGL support for Wayland and X11
in gst-plugins-base, so that the GTK GL sink can be built in gst-plugins-good.
Ideally, each one of the backends we want to build would be accumulated, but meson doesn't have a way to pass "-Doption=foo,bar" as two separate arguments (each -Doption argument overrides the previous one).