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/oslotest/default.nix

@@ -0,0 +1,41 @@
+{ lib
+, buildPythonPackage
+, fetchPypi
+, fixtures
+, pbr
+, subunit
+, callPackage
+}:
+
+buildPythonPackage rec {
+  pname = "oslotest";
+  version = "4.5.0";
+
+  src = fetchPypi {
+    inherit pname version;
+    sha256 = "360ad2c41ba3ad6f059c7c6e7291450d082c2e5dbb0012e839a829978053dfe6";
+  };
+
+  nativeBuildInputs = [ pbr ];
+
+  propagatedBuildInputs = [
+    fixtures
+    subunit
+  ];
+
+  # check in passthru.tests.pytest to escape infinite recursion with other oslo components
+  doCheck = false;
+
+  passthru.tests = {
+    tests = callPackage ./tests.nix {};
+  };
+
+  pythonImportsCheck = [ "oslotest" ];
+
+  meta = with lib; {
+    description = "Oslo test framework";
+    homepage = "https://github.com/openstack/oslotest";
+    license = licenses.asl20;
+    maintainers = teams.openstack.members;
+  };
+}