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/python-modules/milksnake/default.nix

@@ -0,0 +1,26 @@
+{ lib, buildPythonPackage, fetchPypi, cffi }:
+
+buildPythonPackage rec {
+  pname = "milksnake";
+  version = "0.1.5";
+
+  src = fetchPypi {
+    inherit pname version;
+    extension = "zip";
+    sha256 = "120nprd8lqis7x7zy72536gk2j68f7gxm8gffmx8k4ygifvl7kfz";
+  };
+
+  propagatedBuildInputs = [
+   cffi
+  ];
+
+  # tests rely on pip/venv
+  doCheck = false;
+
+  meta = with lib; {
+    description = "A python library that extends setuptools for binary extensions";
+    homepage = "https://github.com/getsentry/milksnake";
+    license = licenses.asl20;
+    maintainers = with maintainers; [ matthiasbeyer ];
+  };
+}