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/development/ocaml-modules/ffmpeg/ffmpeg-avutil.nix

@@ -0,0 +1,23 @@
+{ lib, buildDunePackage, dune-configurator, pkg-config, fetchFromGitHub, callPackage
+, ffmpeg-base ? callPackage ./base.nix { }
+, ffmpeg
+}:
+
+buildDunePackage {
+  pname = "ffmpeg-avutil";
+
+  minimalOCamlVersion = "4.08";
+
+  inherit (ffmpeg-base) version src useDune2;
+
+  nativeBuildInputs = [ pkg-config ];
+  buildInputs = [ dune-configurator ];
+  propagatedBuildInputs = [ ffmpeg.dev ];
+
+  doCheck = true;
+
+  meta = ffmpeg-base.meta // {
+    description = "Bindings for the ffmpeg avutil libraries";
+  };
+
+}