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/xorex/default.nix

@@ -0,0 +1,38 @@
+{ lib
+, python3
+, fetchFromGitHub
+}:
+python3.pkgs.buildPythonApplication rec {
+  pname = "xorex";
+  version = "0.3.0";
+  format = "other";
+
+  src = fetchFromGitHub {
+    owner = "Neo23x0";
+    repo = "xorex";
+    rev = version;
+    sha256 = "rBsOSXWnHRhpLmq20XBuGx8gGBM8ouMyOISkbzUcvE4=";
+  };
+
+  installPhase = ''
+    runHook preInstall
+
+    mkdir -p $out/bin
+    chmod +x xorex.py
+    mv xorex.py $out/bin/xorex
+
+    runHook postInstall
+  '';
+
+  propagatedBuildInputs = with python3.pkgs; [
+    colorama
+    pefile
+  ];
+
+  meta = with lib; {
+    description = "XOR Key Extractor";
+    homepage = "https://github.com/Neo23x0/xorex";
+    license = licenses.asl20;
+    maintainers = teams.determinatesystems.members;
+  };
+}