nixos/flashprog: Enable libjaylink and libftdi modules

flashprog uses the libraries libjaylink and libftdi. So in order for
flashprog to work properly for non-privileged users, enable their
related NixOS modules which enable several udev rules for devices used
by flashprog.

Signed-off-by: Felix Singer <[e-mail]>

nixos/modules/programs/flashprog.nix

···
   config = lib.mkIf cfg.enable {
     services.udev.packages = [ cfg.package ];
     environment.systemPackages = [ cfg.package ];
+    hardware.libjaylink.enable = true;
+    hardware.libftdi.enable = true;
   };
 
   meta.maintainers = with lib.maintainers; [ felixsinger ];