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/pyotp/default.nix

@@ -0,0 +1,21 @@
+{ lib, buildPythonPackage, fetchPypi, isPy27 }:
+
+buildPythonPackage rec {
+  pname = "pyotp";
+  version = "2.6.0";
+  disabled = isPy27;
+
+  src = fetchPypi {
+    inherit pname version;
+    sha256 = "d28ddfd40e0c1b6a6b9da961c7d47a10261fb58f378cb00f05ce88b26df9c432";
+  };
+
+  pythonImportsCheck = [ "pyotp" ];
+
+  meta = with lib; {
+    description = "Python One Time Password Library";
+    homepage = "https://github.com/pyauth/pyotp";
+    license = licenses.mit;
+    maintainers = with maintainers; [ dotlambda ];
+  };
+}