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>

nixos/modules/virtualisation/azure-config-user.nix

@@ -0,0 +1,12 @@
+{ modulesPath, ... }:
+
+{
+  # To build the configuration or use nix-env, you need to run
+  # either nixos-rebuild --upgrade or nix-channel --update
+  # to fetch the nixos channel.
+
+  # This configures everything but bootstrap services,
+  # which only need to be run once and have already finished
+  # if you are able to see this comment.
+  imports = [ "${modulesPath}/virtualisation/azure-common.nix" ];
+}