d/patches: gdkglcontext-wayland: Try creating GL 2.1 context as a last resort
GTK works with GL 2.1 on X11 backend, there's no reason for it to fail to create the context on Wayland when GL 2.1 is the highest version available.
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GTK works with GL 2.1 on X11 backend, there's no reason for it to fail to create the context on Wayland when GL 2.1 is the highest version available.