kodi.packages: add update script for addons from kodi repository

pkgs/applications/video/kodi-packages/requests/default.nix

@@ -1,4 +1,4 @@
-{ lib, buildKodiAddon, fetchzip, certifi, chardet, idna, urllib3 }:
+{ lib, buildKodiAddon, fetchzip, addonUpdateScript, certifi, chardet, idna, urllib3 }:
 buildKodiAddon rec {
   pname = "requests";
   namespace = "script.module.requests";
@@ -16,6 +16,10 @@ buildKodiAddon rec {
     urllib3
   ];
 
+  passthru.updateScript = addonUpdateScript {
+    attrPath = "kodi.packages.requests";
+  };
+
   meta = with lib; {
     homepage = "http://python-requests.org";
     description = "Python HTTP for Humans";