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/tools/cask/default.nix

@@ -0,0 +1,56 @@
+{ lib, stdenv, python3, emacs, bash }:
+
+stdenv.mkDerivation rec {
+  pname = "cask";
+
+  inherit (emacs.pkgs.melpaStablePackages.cask) src version;
+
+  doCheck = true;
+
+  nativeBuildInputs = [ emacs ];
+  buildInputs = with emacs.pkgs; [
+    s f dash ansi ecukes servant ert-runner el-mock
+    noflet ert-async shell-split-string git package-build
+  ] ++ [
+    python3
+    bash
+  ];
+
+  strictDeps = true;
+
+  buildPhase = ''
+    runHook preBuild
+
+    emacs --batch -L . -f batch-byte-compile cask.el cask-cli.el
+
+    runHook postBuild
+  '';
+
+  installPhase = ''
+    runHook preInstall
+
+    mkdir -p $out/bin
+    dir=$out/share/emacs/site-lisp/cask
+    install -Dm444 -t $dir     *.el *.elc
+    install -Dm555 -t $dir/bin bin/cask
+    touch $out/.no-upgrade
+    ln -s $dir/bin/cask $out/bin/cask
+
+    runHook postInstall
+  '';
+
+  meta = with lib; {
+    description = "Project management for Emacs";
+    longDescription = ''
+      Cask is a project management tool for Emacs that helps automate the
+      package development cycle; development, dependencies, testing, building,
+      packaging and more.
+      Cask can also be used to manage dependencies for your local Emacs configuration.
+    '';
+
+    homepage = "https://cask.readthedocs.io/en/latest/index.html";
+    license = licenses.gpl3Plus;
+    maintainers = with maintainers; [ flexw ];
+    platforms = platforms.all;
+  };
+}