bug#26459: 26.0.50; loaddefs.el is regenerated after each "git pull"

[Eli Zaretskii]

> From: Glenn Morris <rgm@gnu.org>
> Cc: 26459@debbugs.gnu.org,  eggert@cs.ucla.edu, raeburn@raeburn.org
> Date: Wed, 12 Apr 2017 12:43:01 -0400
> 
> Eli Zaretskii wrote:
> 
> >> IIUC 440bafe has made this much slower by defeating the prior "only
> >> update where needed" aspect of this.
> >
> > 440bafe made the rule generate the loaddefs in a temporary file.
> > Would it help to copy loaddefs.el into loaddefs.tmp before running
> > batch-update-autoloads?
> 
> Probably, together with a move-if-change at the end.

Done in 88e0125.  Generating loaddefs.el is fast again ;-)