selftests/nolibc: enable -Wmissing-prototypes

User code may want to use this compiler flag.
Make sure it is supported by nolibc.

Acked-by: Willy Tarreau <w@1wt.eu>
Link: https://lore.kernel.org/r/20250123-nolibc-prototype-v1-3-e1afc5c1999a@weissschuh.net
Signed-off-by: Thomas Weißschuh <linux@weissschuh.net>
This commit is contained in:
Thomas Weißschuh 2025-01-23 21:10:44 +01:00
commit 4da4e35e9d