autotools: don't build libGLES*.so with GLVND

GLVND already provides these, so distro packagers have been deleting
them all along. Let's save ourselves the trouble and not build them in
the first place.

Signed-off-by: Eric Engestrom <>
Reviewed-by: Matt Turner <>
Reviewed-by: Dylan Baker <>
Reviewed-by: Emil Velikov <>
25 jobs for !387 with meson-glvnd-gles