bug#64937: "who" reports funny dates

[Sven Joachim]

A 32-bit "who" program reports funny login dates:

,----
| $ file src/who
| src/who: ELF 32-bit LSB pie executable, Intel 80386, version 1 (SYSV), 
dynamically linked, interpreter /lib/ld-linux.so.2, 
BuildID[sha1]=a897e4f7a6dfd45c9245594e3d0b20497472c66d, for GNU/Linux 3.2.0, 
with debug_info, not stripped
| $ src/who
| sven     tty1         133589088-06-27 20:29
| sven     pts/0        121346977-03-14 05:00 (:0)
| sven     tty2         50067723-10-30 01:10
| sven     pts/1        3442548-06-12 17:26 (:0)
`----

This is with current coreutils git (commit 3cb862ce5f1) configured with
"CC=gcc -m32" on Debian sid/amd64, but the same issue can also be seen
on plain i386.  Originally reported by Jakub Wilk in
https://bugs.debian.org/1027135, and I noticed it myself after upgrading
an ancient machine to Debian 12 today.