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/installer/cd-dvd/installation-cd-base.nix

@@ -0,0 +1,50 @@
+# This module contains the basic configuration for building a NixOS
+# installation CD.
+
+{ config, lib, options, pkgs, ... }:
+
+with lib;
+
+{
+  imports =
+    [ ./iso-image.nix
+
+      # Profiles of this basic installation CD.
+      ../../profiles/all-hardware.nix
+      ../../profiles/base.nix
+      ../../profiles/installation-device.nix
+    ];
+
+  # Adds terminus_font for people with HiDPI displays
+  console.packages = options.console.packages.default ++ [ pkgs.terminus_font ];
+
+  # ISO naming.
+  isoImage.isoName = "${config.isoImage.isoBaseName}-${config.system.nixos.label}-${pkgs.stdenv.hostPlatform.system}.iso";
+
+  # EFI booting
+  isoImage.makeEfiBootable = true;
+
+  # USB booting
+  isoImage.makeUsbBootable = true;
+
+  # Add Memtest86+ to the CD.
+  boot.loader.grub.memtest86.enable = true;
+
+  # An installation media cannot tolerate a host config defined file
+  # system layout on a fresh machine, before it has been formatted.
+  swapDevices = mkImageMediaOverride [ ];
+  fileSystems = mkImageMediaOverride config.lib.isoFileSystems;
+
+  boot.postBootCommands = ''
+    for o in $(</proc/cmdline); do
+      case "$o" in
+        live.nixos.passwd=*)
+          set -- $(IFS==; echo $o)
+          echo "nixos:$2" | ${pkgs.shadow}/bin/chpasswd
+          ;;
+      esac
+    done
+  '';
+
+  system.stateVersion = lib.mkDefault lib.trivial.release;
+}