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/programs/wshowkeys.nix

@@ -0,0 +1,27 @@
+{ config, lib, pkgs, ... }:
+
+with lib;
+
+let
+  cfg = config.programs.wshowkeys;
+in {
+  meta.maintainers = with maintainers; [ primeos ];
+
+  options = {
+    programs.wshowkeys = {
+      enable = mkEnableOption ''
+        wshowkeys (displays keypresses on screen on supported Wayland
+        compositors). It requires root permissions to read input events, but
+        these permissions are dropped after startup'';
+    };
+  };
+
+  config = mkIf cfg.enable {
+    security.wrappers.wshowkeys =
+      { setuid = true;
+        owner = "root";
+        group = "root";
+        source = "${pkgs.wshowkeys}/bin/wshowkeys";
+      };
+  };
+}