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/pytestcache/default.nix

@@ -0,0 +1,28 @@
+{ lib, buildPythonPackage, fetchPypi
+, pytest, execnet }:
+
+buildPythonPackage rec {
+  pname = "pytest-cache";
+  version = "1.0";
+
+  src = fetchPypi {
+    inherit pname version;
+    sha256 = "1a873fihw4rhshc722j4h6j7g3nj7xpgsna9hhg3zn6ksknnhx5y";
+  };
+
+  buildInputs = [ pytest ];
+  propagatedBuildInputs = [ execnet ];
+
+  checkPhase = ''
+    py.test
+  '';
+
+  # Too many failing tests. Are they maintained?
+  doCheck = false;
+
+  meta = with lib; {
+    license = licenses.mit;
+    homepage = "https://pypi.python.org/pypi/pytest-cache/";
+    description = "pytest plugin with mechanisms for caching across test runs";
+  };
+}