bug#23672: 25.0.94; unitialized package specific menus

[Paul Eggert]

> > Do you observe a similar problem with Emacs 24.5 when built in your GTK+
> > 3.20.4 environment?
> Yes i do.

OK, so this is not a regression in Emacs then. So it's not clear that this bug 
should block the emacs-25 release.


> [+++]
> ++ I have built emacs-24.5 on Debian 8.4 (which ships gtk+ 3.14)
>     under several desktop environments.
>
> ++ I observe the problem with: gnome and cinnamon.
>     (See the attached snapshots)

Ah, so the bug is not introduced by GTK+ 3.20 either.

We need someone versed in GTK+ (i.e., not me) to debug this sort of thing. If we 
can't find anybody, perhaps we should consider dropping GTK+ support in Emacs, 
or at least not making GTK+ the default.