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/betacode/default.nix

@@ -0,0 +1,19 @@
+{ fetchPypi, buildPythonPackage, pygtrie, isPy3k, lib, }:
+buildPythonPackage rec {
+  pname = "betacode";
+  version = "1.0";
+  src = fetchPypi {
+    inherit pname version;
+    sha256 = "0s84kd9vblbjz61q7zchx64a6hmdqb4lillna5ryh0g9ij76g6r5";
+  };
+  preBuild = "echo > README.rst";
+  # setup.py uses a python3 os.path.join
+  disabled = !isPy3k;
+  propagatedBuildInputs = [ pygtrie ];
+  meta = {
+    homepage = "https://github.com/matgrioni/betacode";
+    description = "A small python package to flexibly convert from betacode to unicode and back.";
+    license = lib.licenses.mit;
+    maintainers = with lib.maintainers; [ kmein ];
+  };
+}