bug#77709: Restoring the Hurd on core-packages-team branch

[yelninei]

This is now fixed in glibc for symlink see 
39183b953c68a489cc0b9aefb8974711c834fb38 but should probably be added to 
glibc/hurd.

Apr 11, 2025, 10:00 by yelninei@tutamail.com:

> The symlink test failure is even more complex than I thought.
>
> In 2009 there was a patch to gnulib to accept the incorrect EINVAL errno > 
> https://git.savannah.gnu.org/cgit/gnulib.git/commit/tests/test-symlink.h?id=48b0feac54dce2caf46cc53dd160e699737ff52a>
>  .
> which should never have been passing in the first place.
>
> And now that this value has changed with glibc-2.41 everything breaks.
>
> Maybe all of these cases in the glibc patch should be EEXIST instead which I 
> think is the behavior on linux (assumption and untested).
>
> I am unsure how to proceed because I don't know who is wrong, gnulib or glibc.
>