utils.nix: pass all attrs

Fixes passing baseRtc and other parameters

wfvm/default.nix

@@ -2,6 +2,6 @@
 
 {
   makeWindowsImage = attrs: import ./win.nix ({ inherit pkgs; } // attrs);
-  layers = (import ./layers { inherit pkgs; });
-  utils = (import ./utils.nix { inherit pkgs; });
+  layers = import ./layers { inherit pkgs; };
+  utils = import ./utils.nix { inherit pkgs; };
 }

wfvm/utils.nix

@@ -4,6 +4,7 @@
 , qemuMem ? "4G"
 , efi ? true
 , enableTpm ? false
+, ...
 }:
 
 rec {

wfvm/win.nix

@@ -14,7 +14,7 @@
 
 let
   lib = pkgs.lib;
-  utils = import ./utils.nix { inherit pkgs efi enableTpm; };
+  utils = import ./utils.nix ({ inherit pkgs efi enableTpm; } // attrs);
   inherit (pkgs) guestfs-tools;
 
   # p7zip on >20.03 has known vulns but we have no better option