maint: Simplify after gnulib changed
Update gnulib submodule to latest.
All of UT_USER_SIZE, UT_ID_SIZE, UT_LINE_SIZE, UT_HOST_SIZE are now -1.
* src/pinky.c (print_entry): Remove code for bounded-length ut_line,
ut_user, ut_host.
(scan_entries): Remove code for bounded-length ut_user.
* src/who.c (print_line): Remove userlen, linelen arguments.
(print_user): Remove code for bounded-length ut_line, ut_user, ut_host.
(make_id_equals_comment): Remove code for bounded-length ut_id.
(print_boottime, print_deadprocs, print_login, print_initspawn,
print_clockchange, print_runlevel, print_heading): Update print_line
invocations.
(scan_entries): Remove code for bounded-length ut_line.