uboot: (firmwareOdroidC2/C4) don't invoke patch tool, use patches = [] instead

https://github.com/NixOS/nixpkgs/blob/master/pkgs/stdenv/generic/setup.sh#L948
this can do it nicely.

Signed-off-by: Anton Arapov <anton@deadbeef.mx>

pkgs/tools/X11/virtualgl/default.nix

@@ -0,0 +1,25 @@
+{ stdenv, lib
+, virtualglLib
+, virtualglLib_i686 ? null
+}:
+
+stdenv.mkDerivation {
+  pname = "virtualgl";
+  version = lib.getVersion virtualglLib;
+
+  paths = [ virtualglLib ];
+
+  buildCommand = ''
+    mkdir -p $out/bin
+    for i in ${virtualglLib}/bin/* ${virtualglLib}/bin/.vglrun*; do
+      ln -s "$i" $out/bin
+    done
+  '' + lib.optionalString (virtualglLib_i686 != null) ''
+    ln -sf ${virtualglLib_i686}/bin/.vglrun.vars32 $out/bin
+  '';
+
+  meta = {
+    platforms = lib.platforms.linux;
+    inherit (virtualglLib.meta) license;
+  };
+}