tests: do not use settimeofday wrapper provided by libc
tests: do not use settimeofday wrapper provided by libc

Workaround limitations of settimeofday wrapper provided by musl libc.

* tests/xettimeofday.c (main): Call settimeofday using syscall().

Reported-by: Szabolcs Nagy <66dbfa9ac70d64a0115425cd5cf334835ba79b72@port70.net>

cuviper/strace,cuviper/strace,Saruta/strace,Saruta/strace,cuviper/strace,Saruta/strace,cuviper/strace,Saruta/strace,Saruta/strace,cuviper/strace