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/libasyncns/default.nix

@@ -0,0 +1,37 @@
+{ lib
+, stdenv
+, buildPythonPackage
+, fetchurl
+, libasyncns
+, pkg-config
+}:
+
+buildPythonPackage rec {
+  pname = "libasyncns-python";
+  version = "0.7.1";
+
+  src = fetchurl {
+    url = "https://launchpad.net/libasyncns-python/trunk/${version}/+download/libasyncns-python-${version}.tar.bz2";
+    sha256 = "1q4l71b2h9q756x4pjynp6kczr2d8c1jvbdp982hf7xzv7w5gxqg";
+  };
+
+  patches = [ ./libasyncns-fix-res-consts.patch ];
+
+  postPatch = lib.optionalString stdenv.isDarwin ''
+    substituteInPlace resquery.c \
+      --replace '<arpa/nameser.h>' '<arpa/nameser_compat.h>'
+  '';
+
+  buildInputs = [ libasyncns ];
+  nativeBuildInputs = [ pkg-config ];
+  doCheck = false; # requires network access
+
+  pythonImportsCheck = [ "libasyncns" ];
+
+  meta = with lib; {
+    description = "libasyncns-python is a python binding for the asynchronous name service query library";
+    license = licenses.lgpl21;
+    maintainers = [ maintainers.mic92 ];
+    homepage = "https://launchpad.net/libasyncns-python";
+  };
+}