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/foolscap/default.nix

@@ -0,0 +1,49 @@
+{ lib
+, buildPythonPackage
+, fetchPypi
+, mock
+, pyopenssl
+, pytestCheckHook
+, service-identity
+, twisted
+}:
+
+buildPythonPackage rec {
+  pname = "foolscap";
+  version = "21.7.0";
+
+  src = fetchPypi {
+    inherit pname version;
+    sha256 = "sha256-6dGFU4YNk1joXXZi2c2L84JtUbTs1ICgXfv0/EU2P4Q=";
+  };
+
+  propagatedBuildInputs = [
+    mock
+    twisted
+    pyopenssl
+    service-identity
+  ];
+
+  checkInputs = [
+    pytestCheckHook
+  ];
+
+  disabledTestPaths = [
+    # Not all dependencies are present
+    "src/foolscap/test/test_connection.py"
+  ];
+
+  pythonImportsCheck = [ "foolscap" ];
+
+  meta = with lib; {
+    description = "RPC protocol for Python that follows the distributed object-capability model";
+    longDescription = ''
+      "Foolscap" is the name for the next-generation RPC protocol, intended to
+      replace Perspective Broker (part of Twisted). Foolscap is a protocol to
+      implement a distributed object-capabilities model in Python.
+    '';
+    homepage = "https://github.com/warner/foolscap";
+    license = licenses.mit;
+    maintainers = with maintainers; [ ];
+  };
+}