Auto merge of #542 - Susurrus:master, r=alexcrichton
Auto merge of #542 - Susurrus:master, r=alexcrichton

Add OXTABS and ONOEOT for BSD systems

According to all references I could find these are BSD extensions to POSIX and are also supported on OS X.

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