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/pytun/default.nix

@@ -0,0 +1,27 @@
+{ lib
+, buildPythonPackage
+, fetchFromGitHub
+}:
+
+buildPythonPackage rec {
+  pname = "pytun";
+  version = "2.3.0";
+
+  src = fetchFromGitHub {
+    rev = "v${version}";
+    owner = "montag451";
+    repo = "pytun";
+    sha256 = "1cqq8aci38058fjh4a0xf21wac177fw576p2yjl2b8jd9rnsqbl5";
+  };
+
+  # Test directory contains examples, not tests.
+  doCheck = false;
+
+  meta = with lib; {
+    homepage = "https://github.com/montag451/pytun";
+    description = "Linux TUN/TAP wrapper for Python";
+    license = licenses.mit;
+    maintainers = with maintainers; [ montag451 ];
+    platforms = platforms.linux;
+  };
+}