editors/emacs-devel: Update to 2022-05-30 commit, 774880c

Since the last port update two upstream bugs have been fixed.

• The first was a fix to a crash caused by a use-after-free issue. This

crash was likely only noticed on CURRENT, because jemalloc is built
there with settings to fill freed memory with sentinel data (0x5a). The
patch to fix the problem was submitted upstream by ashish@.

• The second fix was for a longstanding bug that would cause Emacs to

lock up under certain conditions when the primary selection was probed
at regular intervals. [2]

[1] https://git.savannah.gnu.org/cgit/emacs.git/commit/?id=d52749202f690a50f832c25ddd80929d175e67b4
[2] https://debbugs.gnu.org/cgi/bugreport.cgi?bug=22214

Sponsored by: The FreeBSD Foundation