Bug#848166: grub: Build-Depends on lib32ncurses5 which is going away

[Sven Joachim]

Source: grub
Version: 0.97-72
Tags: buster sid
Control: block 848163 by -1

I intend to remove the ncurses multilib packages after the stretch
release, see #848163.  I'm not quite sure how long you want to keep the
grub-legacy package alive, but this means that you will at least have to
build /usr/sbin/grub without ncurses support on amd64.

Simply dropping lib32ncurses5 from Build-Depends would be sufficient,
and I guess most users never run the grub shell interactively from the
running system anyway, but maybe it would also be good to have a
NEWS.Debian mentioning how to install the i386 version of grub-legacy
via multiarch if a full-fledged grub shell is desired for some reason.