headache: add passthru.updateScript

pkgs/development/tools/headache/default.nix

@@ -1,4 +1,4 @@
-{ lib, fetchFromGitHub, ocamlPackages }:
+{ lib, fetchFromGitHub, nix-update-script, ocamlPackages }:
 
 with ocamlPackages;
 
@@ -17,6 +17,8 @@ buildDunePackage rec {
     camomile
   ];
 
+  passthru.updateScript = nix-update-script { };
+
   meta = with lib; {
     homepage = "https://github.com/frama-c/${pname}";
     description = "Lightweight tool for managing headers in source code files";