bug#25360: File mode specification errors during building

[Eli Zaretskii]

> From: phillip.lord@russet.org.uk (Phillip Lord)
> Cc: rgm@gnu.org,  25360@debbugs.gnu.org
> Date: Fri, 13 Jan 2017 14:08:55 +0000
> 
> So, the cause of the problem is this. bootstrap-emacs (nor emacs) does
> not actually load loaddefs.el; it's just dumped with the binary. I was
> recording autoloads until loaddefs.el was generated, but actually, I
> need to record them till loaddefs.el is used, that is when emacs is
> dumped.
> 
> The attached patch seems to address. Can you confirm, then I will apply
> to master.

Looks OK, but I guess the comment before the changed code needs to be
updated as well?

Thanks.