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/mathlibtools/default.nix

@@ -0,0 +1,26 @@
+{ lib, buildPythonPackage, fetchPypi, PyGithub, GitPython, toml, click, tqdm,
+  networkx, pydot, pyyaml, atomicwrites }:
+
+buildPythonPackage rec {
+  pname = "mathlibtools";
+  version = "1.1.1";
+
+  src = fetchPypi {
+    inherit pname version;
+    sha256 = "sha256-0iW7SWIxb+Ek4T26hru5EgBgXfqRh6zOR73GAgLFNyE=";
+  };
+
+  propagatedBuildInputs = [
+    PyGithub GitPython toml click tqdm networkx pydot pyyaml atomicwrites
+  ];
+
+  # requires internet access
+  doCheck = false;
+
+  meta = with lib; {
+    homepage = "https://github.com/leanprover-community/mathlib-tools";
+    description = "leanproject is a supporting tool for Lean's mathlib";
+    license = licenses.asl20;
+    maintainers = with maintainers; [ gebner ];
+  };
+}