editors/emacs: Backport Emacs 29.4 security fix

Details about the security vulnerability can be found at
https://seclists.org/oss-sec/2024/q2/296.

Reviewed by:	ashish
Sponsored by:	The FreeBSD Foundation
Security:	https://vuxml.freebsd.org/freebsd/4f6c4c07-3179-11ef-9da5-1c697a616631.html
Differential Revision:	https://reviews.freebsd.org/D45714

(cherry picked from commit 8ef91da5)