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/py-lru-cache/default.nix

@@ -0,0 +1,23 @@
+{ lib
+, buildPythonPackage
+, fetchPypi
+}:
+
+buildPythonPackage rec {
+  pname = "py-lru-cache";
+  version = "0.1.4";
+
+  src = fetchPypi {
+    inherit version;
+    pname = "py_lru_cache";
+    sha256 = "1w3a8l3ckl1zz0f2vlfrawl9a402r458p7xzhy4sgq8k9rl37pq2";
+  };
+
+  meta = with lib; {
+    description = "An in-memory LRU cache for python";
+    homepage = "https://github.com/stucchio/Python-LRU-cache";
+    license = licenses.gpl3;
+    maintainers = [ maintainers.costrouc ];
+  };
+
+}