sophia: use fsync() instead of fdatasync() for FreeBSD
sophia: use fsync() instead of fdatasync() for FreeBSD

original PR:
https://github.com/zloidemon/sophia/commit/d483d59e26e2ad5b462ca6e504bae236256c0fba

clibs/sophia,mneumann/sophia,perint/sophia,mneumann/sophia,tarantool/sophia,perint/sophia,mneumann/sophia,clibs/sophia,clibs/sophia,tarantool/sophia,perint/sophia,mknight-tag/sophia,mknight-tag/sophia,Bitcoinsulting/sophia,tarantool/sophia,Bitcoinsulting/sophia,Bitcoinsulting/sophia,mknight-tag/sophia