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/testscenarios/default.nix

@@ -0,0 +1,30 @@
+{ lib
+, buildPythonPackage
+, fetchPypi
+, testtools
+}:
+
+buildPythonPackage rec {
+  pname = "testscenarios";
+  version = "0.5.0";
+
+  src = fetchPypi {
+    inherit pname version;
+    sha256 = "c257cb6b90ea7e6f8fef3158121d430543412c9a87df30b5dde6ec8b9b57a2b6";
+  };
+
+  postPatch = ''
+    substituteInPlace setup.cfg \
+      --replace "buffer = 1" "" \
+      --replace "catch = 1" ""
+  '';
+
+  propagatedBuildInputs = [ testtools ];
+
+  meta = with lib; {
+    description = "A pyunit extension for dependency injection";
+    homepage = "https://pypi.python.org/pypi/testscenarios";
+    license = licenses.asl20;
+  };
+
+}