This makes it possible to build open-source MuJoCo with Wayland support out of
the box.
Currently, it is necessary to run cmake with -DGLFW_USE_WAYLAND=ON and ensure
cmake can find the "ECM" package somehow (a dependency of the 3.3.6 version of
GLFW), for which there is no automated fetching setup. As this is no longer a
dependency of GLFW it seems to make more sense to update GLFW to make out of the
box builds on Wayland.
PiperOrigin-RevId: 800456607
Change-Id: Iffdf1d65319bfb134e580faceb63ac3bed7b9c84
Michiel Blokzijl
508d22f794