bug#55946: 29.0.50; minibuffer-mode lacks an abbrev table

[Eli Zaretskii]

> From: Sean Whitton <spwhitton@spwhitton.name>
> Date: Mon, 13 Jun 2022 11:38:43 -0500
> 
> I'd like to define an abbrev for minibuffer-mode but it doesn't have an
> abbrev table.  There's a comment in minibuffer.el saying that this is
> because abbrev.el is not loaded early enough.

AFAICT, we only invoke this mode from C if it is fboundp.  So maybe
try changing that, and see if both a bootstrap and a simple build run
to completion OK.