Bug#979160: glibc FTBFS on kfreebsd-*: Uses configure option --enable-add-ons=fbtl

[Samuel Thibault <sthibault@debian.org>]

Hello,

Mattias Ellert, le dim. 03 janv. 2021 18:19:37 +0100, a ecrit:
> 	--enable-add-ons=libidn,"fbtl " \
> 
> However, the configure script does not have an --enable-add-ons option,
> so this is ignored. (Option is not listed by ./configure --help, nor
> found by grepping for it.)

FI, in NEWS:

* The add-ons mechanism for building additional packages at the same time as
  glibc has been removed.  The --enable-add-ons configure option is now
  ignored.

So fbtl needs to be included in Makefiles etc. just like htl is for
instance.

Samuel