Adding missing WIFCONTINUED function on FreeBSD systems
Adding missing WIFCONTINUED function on FreeBSD systems

superriva/libc,superriva/libc,rust-lang/libc,philippkeller/libc,rust-lang-nursery/libc,rust-lang-nursery/libc,mneumann/libc,anatol/libc,rust-lang-nursery/libc,mneumann/libc,philippkeller/libc,rust-lang/libc,mneumann/libc,anatol/libc,cactorium/libc,superriva/libc,anatol/libc,cactorium/libc,philippkeller/libc,rust-lang/libc,cactorium/libc