Increase timeout from the default 20s to 40s. This test makes close to
2 million syscalls with distribution:
1180249 connect
297952 getsockname
144040 lseek
143734 read
14466 close
...
connect can be slow, so the default timeout was not enough on slow
systems.
Reviewed-by: Carlos O'Donell <carlos@redhat.com>
* nss/tst-nss-files-hosts-multi.c (TIMEOUT): Define.