bug#15763: autoload-generate-file-autoloads can put package--builtin-versions in wrong file

[Glenn Morris]

Glenn Morris wrote:

> Just found a real example of this problem:
> test/lisp/org/org-tests.el: org-package-version fails in both emacs-27
> and master. This is because there is no entry for org in
> package--builtin-versions. And this is because the entry has gone to
> lisp/org/org-loaddefs.el instead of lisp/loaddefs.el.

Hmm, actually, that looks like a bug in org.el.
There is now no autoload for org-mode in emacs-27 -Q.
I wonder why org.el now puts all autoloads in org-loaddefs
(and why such a change is in a bugfix release).
There's zero information in the Emacs repository about the
reason behind any of the Org 9.4.1 changes ("Update to Org 9.4.1" is all
we get).