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/applications/office/beancount/bean-add.nix

@@ -0,0 +1,32 @@
+{ lib, stdenv, fetchFromGitHub, python3Packages }:
+
+stdenv.mkDerivation {
+  pname = "bean-add";
+  version = "unstable-2018-01-08";
+
+  src = fetchFromGitHub {
+    owner = "simon-v";
+    repo = "bean-add";
+    rev = "660c657f295b019d8dbc26375924eb17bf654341";
+    sha256 = "0vzff2hdng8ybwd5frflhxpak0yqg0985p1dy7vpvhr8kbqqzwdz";
+  };
+
+  propagatedBuildInputs = with python3Packages; [ python ];
+
+  installPhase = ''
+    mkdir -p $out/bin/
+    cp bean-add $out/bin/bean-add
+    chmod +x $out/bin/bean-add
+  '';
+
+  meta = {
+    homepage = "https://github.com/simon-v/bean-add/";
+    description = "beancount transaction entry assistant";
+
+    # The (only) source file states:
+    #   License: "Do what you feel is right, but don't be a jerk" public license.
+
+    maintainers = with lib.maintainers; [ matthiasbeyer ];
+  };
+}
+