Same of libc_{freebsd,openbsd}.go.

Should help <cznic/sqlite#202>.

Same of libc_{freebsd,openbsd}.go.

Now all tests passes.

Same of libc_{illumos,linux}_amd64.go.

In OpenBSD's libc time() is a wrapper around gettimeofday[1], implement
it in the same way here.

[1]: https://github.com/openbsd/src/blob/master/lib/libc/gen/time.c

Same of libc_openbsd.go and libc_freebsd_{amd64,arm64}.go

Also sort.

openbsd: Add time

Closes #47

See merge request cznic/libc!23

implement Xputchar on windows

See merge request cznic/libc!24