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/tenacity/default.nix

@@ -0,0 +1,33 @@
+{ lib, buildPythonPackage, fetchPypi, isPy27, isPy3k
+, pbr, six, futures ? null, monotonic ? null, typing ? null, setuptools-scm
+, pytest, sphinx, tornado, typeguard
+}:
+
+buildPythonPackage rec {
+  pname = "tenacity";
+  version = "8.0.1";
+
+  src = fetchPypi {
+    inherit pname version;
+    sha256 = "43242a20e3e73291a28bcbcacfd6e000b02d3857a9a9fff56b297a27afdc932f";
+  };
+
+  nativeBuildInputs = [ pbr setuptools-scm ];
+  propagatedBuildInputs = [ six ]
+    ++ lib.optionals isPy27 [ futures monotonic typing ];
+
+  checkInputs = [ pytest sphinx tornado ]
+    ++ lib.optionals isPy3k [ typeguard ];
+  checkPhase = if isPy27 then ''
+    pytest --ignore='tenacity/tests/test_asyncio.py'
+  '' else ''
+    pytest
+  '';
+
+  meta = with lib; {
+    homepage = "https://github.com/jd/tenacity";
+    description = "Retrying library for Python";
+    license = licenses.asl20;
+    maintainers = with maintainers; [ jakewaksbaum ];
+  };
+}