bug#25360: File mode specification errors during building

[Eli Zaretskii]

> Date: Sun, 5 Mar 2017 18:58:52 -0000
> From: "Phillip Lord" <phillip.lord@russet.org.uk>
> Cc: 25360@debbugs.gnu.org
> 
> In the mean time, try stuffing this:
> 
> (autoload 'w32-convert-standard-filename "w32-fns.el" nil nil nil)
> 
> into ldefs-boot-auto.el. generate-ldefs-boot adds this for me anyway. If
> it works for you, I can add this to master quicker than I can revert.

Why would that change anything?  ldefs-boot-manual.el already includes
that line, so ldefs-boot-auto.el doesn't have to, right?