freebsd: remove getrandom dependency from libc

The system call getrandom(2) just landed on FreeBSD 12, so if we want to
support some earlier version or at least FreeBSD 11, we can't depend on
the system call.
1811e7e6c9Marcio Giaxa committed on 12/19/2018, 8:42:00 PMparent11ced4f
3 files changedLine totals unavailable