mesa: 17.2.8 -> 17.3.3

TODO: verify that S3TC works without adding libtxc*,
and clean all the related code.

pkgs/development/libraries/mesa/default.nix

···
 in
 
 let
-  version = "17.2.8";
+  version = "17.3.3";
   branch  = head (splitString "." version);
   driverLink = "/run/opengl-driver" + optionalString stdenv.isi686 "-32";
 in
···
       "ftp://ftp.freedesktop.org/pub/mesa/older-versions/${branch}.x/${version}/mesa-${version}.tar.xz"
       "https://mesa.freedesktop.org/archive/mesa-${version}.tar.xz"
     ];
-    sha256 = "0pq9kmmyllgd63d936f3x1zsg7sqaswx47khbn0gvbgari2h753f";
+    sha256 = "16rpm4rwmzd4kdgipa1gw262jqg3346gih0y3bsc3bgn1vgcbfj1";
   };
 
   prePatch = "patchShebangs .";
···
     "--enable-shared-glapi"
     "--enable-sysfs"
     "--enable-llvm-shared-libs"
-    "--enable-omx"
+    "--enable-omx-bellagio"
     "--enable-va"
     "--disable-opencl"
   ];