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/viewstate/default.nix

@@ -0,0 +1,36 @@
+{ buildPythonPackage
+, fetchFromGitHub
+, isPy3k
+, lib
+, pytest
+}:
+
+buildPythonPackage rec {
+  pname = "viewstate";
+  version = "0.4.3";
+  disabled = !isPy3k;
+
+  src = fetchFromGitHub {
+    owner = "yuvadm";
+    repo = pname;
+    rev = "v${version}";
+    sha256 = "15s0n1lhkz0zwi33waqkkjipal3f7s45rxsj1bw89xpr4dj87qx5";
+  };
+
+  checkInputs = [
+    pytest
+  ];
+
+  checkPhase = ''
+    pytest
+  '';
+
+  meta = {
+    description = ".NET viewstate decoder";
+    homepage = "https://github.com/yuvadm/viewstate";
+    license = lib.licenses.mit;
+    maintainers = with lib.maintainers; [
+      kamadorueda
+    ];
+  };
+}