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/keystoneauth1/default.nix

@@ -0,0 +1,77 @@
+{ lib
+, buildPythonPackage
+, fetchPypi
+, betamax
+, hacking
+, iso8601
+, lxml
+, oauthlib
+, os-service-types
+, oslo-config
+, oslo-utils
+, pbr
+, pycodestyle
+, pyyaml
+, requests
+, requests-kerberos
+, requests-mock
+, six
+, stestr
+, stevedore
+, testresources
+, testtools
+}:
+
+buildPythonPackage rec {
+  pname = "keystoneauth1";
+  version = "4.6.0";
+
+  src = fetchPypi {
+    inherit pname version;
+    sha256 = "sha256-Bm8a3diRFM1qG5yzVVyOqn0BNnPuEDS9/lBgaIBKngU=";
+  };
+
+  postPatch = ''
+    # only a small portion of the listed packages are actually needed for running the tests
+    # so instead of removing them one by one remove everything
+    rm test-requirements.txt
+  '';
+
+  propagatedBuildInputs = [
+    betamax
+    iso8601
+    lxml
+    oauthlib
+    os-service-types
+    pbr
+    requests
+    requests-kerberos
+    six
+    stevedore
+  ];
+
+  checkInputs = [
+    hacking
+    oslo-config
+    oslo-utils
+    pycodestyle
+    pyyaml
+    requests-mock
+    stestr
+    testresources
+    testtools
+  ];
+
+  checkPhase = ''
+    stestr run
+  '';
+
+  pythonImportsCheck = [ "keystoneauth1" ];
+
+  meta = with lib; {
+    description = "Authentication Library for OpenStack Identity";
+    homepage = "https://github.com/openstack/keystoneauth";
+    license = licenses.asl20;
+    maintainers = teams.openstack.members;
+  };
+}