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/txrequests/default.nix

@@ -0,0 +1,35 @@
+{ lib
+, buildPythonPackage
+, fetchPypi
+, twisted
+, requests
+, cryptography
+, python
+}:
+
+buildPythonPackage rec {
+  pname = "txrequests";
+  version = "0.9.6";
+
+  src = fetchPypi {
+    inherit pname version;
+    sha256 = "b452a1cafa4d005678f6fa47922a330feb4907d5b4732d1841ca98e89f1362e1";
+  };
+
+  propagatedBuildInputs = [ twisted requests cryptography ];
+
+  # Require network access
+  doCheck = false;
+
+  checkPhase = ''
+    ${python.interpreter} -m unittest discover
+  '';
+
+  meta = with lib; {
+    description = "Asynchronous Python HTTP for Humans.";
+    homepage    = "https://github.com/tardyp/txrequests";
+    license     = licenses.asl20;
+    maintainers = with maintainers; [ ];
+  };
+
+}