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/security/ecryptfs/helper.nix

@@ -0,0 +1,34 @@
+{ lib, stdenv
+, fetchurl
+, makeWrapper
+, python2
+}:
+
+stdenv.mkDerivation {
+  pname   = "ecryptfs-helper";
+  version = "20160722";
+
+  src = fetchurl {
+    url    = "https://gist.githubusercontent.com/obadz/ec053fdb00dcb48441d8313169874e30/raw/4b657a4b7c3dc684e4d5e3ffaf46ced1b7675163/ecryptfs-helper.py";
+    sha256 = "0gp4m22zc80814ng80s38hp930aa8r4zqihr7jr23m0m2iq4pdpg";
+  };
+
+  dontUnpack = true;
+
+  nativeBuildInputs = [ makeWrapper ];
+
+  # Do not hardcode PATH to ${ecryptfs} as we need the script to invoke executables from /run/wrappers/bin
+  installPhase = ''
+    mkdir -p $out/bin $out/libexec
+    cp $src $out/libexec/ecryptfs-helper.py
+    makeWrapper "${python2.interpreter}" "$out/bin/ecryptfs-helper" --add-flags "$out/libexec/ecryptfs-helper.py"
+  '';
+
+  meta = with lib; {
+    description    = "Helper script to create/mount/unemount encrypted directories using eCryptfs without needing root permissions";
+    license        = licenses.gpl2Plus;
+    maintainers    = with maintainers; [ obadz ];
+    platforms      = platforms.linux;
+    hydraPlatforms = [];
+  };
+}