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/package-management/nixops/python-env/shell.nix

@@ -0,0 +1,8 @@
+let
+  pkgs = import ../../../../../. { };
+in pkgs.mkShell {
+  packages = [
+    pkgs.python2
+    pkgs.poetry
+  ];
+}