jbuilder & opam-lib: mark as maintenance-intent: ["(none)"]

Author: hannesm

packages/jbuilder/jbuilder.transition/opam

@@ -18,3 +18,4 @@ post-messages: [
 synopsis:
   "This is a transition package, jbuilder is now named dune. Use the dune"
 description: "package instead."
+x-maintenance-intent: ["(none)"]

packages/opam-lib/opam-lib.1.3.1/opam

@@ -46,3 +46,4 @@ url {
     "md5=e0688c0cf9a55f93ee93f62d07cf6b74"
   ]
 }
+x-maintenance-intent: ["(none)"]