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/os-specific/darwin/dockutil/default.nix

@@ -0,0 +1,37 @@
+{ lib, stdenv, fetchurl, libarchive, p7zip }:
+stdenv.mkDerivation rec {
+  pname = "dockutil";
+  version = "3.0.2";
+
+  src = fetchurl {
+    url =
+      "https://github.com/kcrawford/dockutil/releases/download/${version}/dockutil-${version}.pkg";
+    sha256 = "175137ea747e83ed221d60b18b712b256ed31531534cde84f679487d337668fd";
+  };
+
+  dontBuild = true;
+
+  nativeBuildInputs = [ libarchive p7zip ];
+
+  unpackPhase = ''
+    7z x $src
+    bsdtar -xf Payload~
+  '';
+
+  installPhase = ''
+    runHook preInstall
+    mkdir -p $out/bin
+    mkdir -p $out/usr/local/bin
+    install -Dm755 usr/local/bin/dockutil -t $out/usr/local/bin
+    ln -rs $out/usr/local/bin/dockutil $out/bin/dockutil
+    runHook postInstall
+  '';
+
+  meta = with lib; {
+    description = "Tool for managing dock items";
+    homepage = "https://github.com/kcrawford/dockutil";
+    license = licenses.asl20;
+    maintainers = with maintainers; [ tboerger ];
+    platforms = platforms.darwin;
+  };
+}