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/package-management/nix-du/default.nix

@@ -0,0 +1,44 @@
+{ lib
+, stdenv
+, fetchFromGitHub
+, rustPlatform
+, nix
+, nlohmann_json
+, boost
+, graphviz
+, Security
+, pkg-config
+}:
+
+rustPlatform.buildRustPackage rec {
+  pname = "nix-du";
+  version = "0.5.1";
+
+  src = fetchFromGitHub {
+    owner = "symphorien";
+    repo = "nix-du";
+    rev = "v${version}";
+    sha256 = "sha256-LOs+geYOiAigxwc4VD0FiZQjAnIrcV9ncyPuwGhS92E=";
+  };
+
+  cargoSha256 = "sha256-aEm+SQgE63ZWpb2kXavyoiq2rVkaebFw8kqWPMr2aMA=";
+
+  doCheck = true;
+  checkInputs = [ nix graphviz ];
+
+  buildInputs = [
+    boost
+    nix
+    nlohmann_json
+  ] ++ lib.optionals stdenv.isDarwin [ Security ];
+
+  nativeBuildInputs = [ pkg-config rustPlatform.bindgenHook ];
+
+  meta = with lib; {
+    description = "A tool to determine which gc-roots take space in your nix store";
+    homepage = "https://github.com/symphorien/nix-du";
+    license = licenses.lgpl3Only;
+    maintainers = [ maintainers.symphorien ];
+    platforms = platforms.unix;
+  };
+}