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/applications/editors/vim/plugins/update-shell.nix

@@ -0,0 +1,16 @@
+{ pkgs ? import ../../../../.. { } }:
+
+# Ideally, pkgs points to default.nix file of Nixpkgs official tree
+with pkgs;
+let
+  pyEnv = python3.withPackages (ps: [ ps.GitPython ]);
+in
+
+mkShell {
+  packages = [
+    bash
+    pyEnv
+    nix
+    nix-prefetch-scripts
+  ];
+}