opengl service: don't override mesa non-drivers in runtime

Changed files
-1
nixos
modules
hardware
-1
nixos/modules/hardware/opengl.nix
···
name = "mesa-drivers+txc-${p.mesa_drivers.version}";
paths =
[ p.mesa_drivers
-
p.mesa_drivers.out # mainly for libGL
(if cfg.s3tcSupport then p.libtxc_dxtn else p.libtxc_dxtn_s2tc)
];
};