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/tools/misc/mailman-rss/default.nix

@@ -0,0 +1,25 @@
+{ lib, python3Packages, withTwitter ? false}:
+
+python3Packages.buildPythonApplication rec {
+  pname = "mailman-rss";
+  version = "0.2.4";
+
+  src = python3Packages.fetchPypi {
+    inherit pname version;
+    sha256 = "1brrik70jyagxa9l0cfmlxvqpilwj1q655bphxnvjxyganxf4c00";
+  };
+
+  propagatedBuildInputs = with python3Packages; [ python-dateutil future requests beautifulsoup4 ]
+    ++ lib.optional withTwitter python3Packages.twitter
+  ;
+
+  # No tests in Pypi Tarball
+  doCheck = false;
+
+  meta = with lib; {
+    description = "Mailman archive -> rss converter";
+    homepage = "https://github.com/kyamagu/mailman-rss";
+    license = licenses.mit;
+    maintainers = with maintainers; [ samueldr ];
+  };
+}