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/networking/yrd/default.nix

@@ -0,0 +1,37 @@
+{ lib
+, python3
+, fetchFromGitHub
+}:
+
+python3.pkgs.buildPythonApplication rec {
+  pname = "yrd";
+  version = "0.5.3";
+
+  src = fetchFromGitHub {
+    owner = "kpcyrd";
+    repo = pname;
+    rev = "v${version}";
+    sha256 = "1yx1hr8z4cvlb3yi24dwafs0nxq41k4q477jc9q24w61a0g662ps";
+  };
+
+  propagatedBuildInputs = with python3.pkgs; [
+    argh
+    requests
+  ];
+
+  checkInputs = with python3.pkgs; [
+    nose
+  ];
+
+  checkPhase = ''
+    nosetests -v yrd
+  '';
+
+  meta = with lib; {
+    description = "Cjdns swiss army knife";
+    maintainers = with maintainers; [ akru ];
+    platforms = platforms.linux;
+    license = licenses.gpl3Only;
+    homepage = "https://github.com/kpcyrd/yrd";
+  };
+}