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/jsonconversion/default.nix

@@ -0,0 +1,26 @@
+{ lib, buildPythonPackage, fetchPypi, pytestCheckHook, numpy }:
+
+buildPythonPackage rec {
+  pname = "jsonconversion";
+  version = "0.2.13";
+
+  src = fetchPypi {
+    inherit pname version;
+    sha256 = "sha256-4hMY0N/Px+g5zn3YzNfDWPyi8Pglvd/c2N9SeC4JoZ0=";
+  };
+
+  postPatch = ''
+    substituteInPlace setup.py --replace "'pytest-runner'" ""
+  '';
+
+  checkInputs = [ pytestCheckHook numpy ];
+
+  pythonImportsCheck = [ "jsonconversion" ];
+
+  meta = with lib; {
+    description = "This python module helps converting arbitrary Python objects into JSON strings and back";
+    homepage = "https://pypi.org/project/jsonconversion/";
+    license = licenses.bsd2;
+    maintainers = [ maintainers.terlar ];
+  };
+}