Bug#1109129: m4 FTBFS on hurd-amd64: outdated gnulib copy

[Helmut Grohne <helmut@subdivi.de>]

Package: m4
Version: 1.4.19-8
Tags: upstream fixed-upstream
Forwarded: https://bugs.gnu.org/63334
X-Debbugs-Cc: debian-hurd@lists.debian.org

m4 has contains an outdated vendor copy of gnulib that does not yet know 
about hurd-amd64. The underlying bug and patch on the gnulib side is 
https://bugs.gnu.org/63334 and has since been fixed there. Also the 
Debian gnulib package version 20250303-1 contains the fix. What does not 
contain the fix is m4's copy. Could you please update it (after trixie 
is released)?

Thanks to Samuel for having done all the actual work.

Helmut