release: fix on-disc pkg binary symbolic links

Approved by: re (kib)
PR: 263574
Reported by: loader
Sponsored by: Rubicon Communications, LLC ("Netgate")

(cherry picked from commit 68b0a79b7c7ab75597e2511f880238fbf8cfad32)
(cherry picked from commit fab1a7b9b6210257c5c048cdf754ca201fae7669)