selftests/nolibc: use snprintf() for printf tests

With a proper snprintf() implementation in place, the ugly pipe usage is
not necessary anymore.

Signed-off-by: Thomas Weißschuh <thomas.weissschuh@linutronix.de>
Acked-by: Willy Tarreau <w@1wt.eu>
This commit is contained in:
Thomas Weißschuh 2025-04-11 11:00:52 +02:00 • committed by Thomas Weißschuh
commit c685cd6db5