bug#25360: File mode specification errors during building

[Eli Zaretskii]

> From: Glenn Morris <rgm@gnu.org>
> Date: Wed, 04 Jan 2017 15:28:26 -0500
> 
> In current master, the following errors occur during building:
> 
>   Converting cangjie-table.b5 to tsang-b5.el...
>   File mode specification error: (wrong-type-argument stringp 
> image-type-auto-detected-p)
> 
> (same for quick-b5.el, tsang-cns.el, quick-cns.el, PY.el, ZIRANMA.el)
> 
>   Converting CTLau.html to CTLau.el...
>   File mode specification error: (void-function html-mode)
> 
> (same for CTLau-b5.el)
> 
> 
> They don't actually seem to stop the build, but still they should not be
> happening. (I would guess recent changes related to loaddefs generation
> are the cause.)
> 
> 
> See eg http://hydra.nixos.org/build/45973447/log/raw

Phillip, could you please look into this?

Thanks.