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/xcffib/default.nix

@@ -0,0 +1,38 @@
+{ lib
+, buildPythonPackage
+, fetchPypi
+, xorg
+, cffi
+, nose
+, six
+}:
+
+buildPythonPackage rec {
+  version = "0.11.1";
+  pname = "xcffib";
+
+  src = fetchPypi {
+    inherit pname version;
+    sha256 = "12949cfe2e68c806efd57596bb9bf3c151f399d4b53e15d1101b2e9baaa66f5a";
+  };
+
+  patchPhase = ''
+    # Hardcode cairo library path
+    sed -e 's,ffi\.dlopen(,&"${xorg.libxcb.out}/lib/" + ,' -i xcffib/__init__.py
+  '';
+
+  propagatedBuildInputs = [ cffi six ];
+
+  propagatedNativeBuildInputs = [ cffi ];
+
+  checkInputs = [ nose ];
+
+  pythonImportsCheck = [ "xcffib" ];
+
+  meta = with lib; {
+    description = "A drop in replacement for xpyb, an XCB python binding";
+    homepage = "https://github.com/tych0/xcffib";
+    license = licenses.asl20;
+    maintainers = with maintainers; [ kamilchm ];
+  };
+}