libsdl-org
gdk: Add support for building with OpenGL on Xbox
This is a WIP patch to build the Xbox GDK SDL with OpenGL support. This is part of the FNA team's work to support GDK via GLon12, which is also in development:
https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/19022
In addition to enabling the obvious stuff, we have some GDI/WGL "stuff" that we're faking for Xbox targets, and that could possibly change depending on what we do for GLon12. @TheSpydog has been handling it up to this point, but we're also bringing in Eden Industries to put the finishing touches on everything!
This got blown apart a bit by the SDL3 splitup, but provided this diff looks okay we can do the rebase and get this submitted - we're in the final stages of the GLon12 patch so we're hoping to get these both merged at the same time!
