add missing dependency of ascn on klarlack build

.gitlab-ci.yml

@@ -90,6 +90,8 @@ build:klarlack:manual:
 # ascn: same as klarlack, plus Dockerfile.ascn
 build:ascn:
   extends: .build-ascn
+  dependencies:
+    - build:klarlack
   rules:
     - changes:
       - container/Dockerfile.ascn