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/text/reckon/default.nix

@@ -0,0 +1,33 @@
+{ stdenv, lib, bundlerEnv, bundlerUpdateScript, makeWrapper }:
+
+stdenv.mkDerivation rec {
+  pname = "reckon";
+  version = (import ./gemset.nix).reckon.version;
+
+  dontUnpack = true;
+
+  nativeBuildInputs = [ makeWrapper ];
+
+  installPhase = let
+    env = bundlerEnv {
+      name = "${pname}-${version}-gems";
+
+      gemdir = ./.;
+    };
+  in ''
+    runHook preInstall
+    mkdir -p $out/bin
+    makeWrapper ${env}/bin/reckon $out/bin/reckon
+    runHook postInstall
+  '';
+
+  passthru.updateScript = bundlerUpdateScript "reckon";
+
+  meta = with lib; {
+    description = "Flexibly import bank account CSV files into Ledger for command line accounting";
+    license = licenses.mit;
+    maintainers = with maintainers; [ nicknovitski ];
+    platforms = platforms.unix;
+    changelog = "https://github.com/cantino/reckon/blob/v${version}/CHANGELOG.md";
+  };
+}