Changed Redox 'mode_t' constants to Hexadecimal.
Changed Redox 'mode_t' constants to Hexadecimal.

rust-lang-nursery/libc,rust-lang-nursery/libc,cactorium/libc,cactorium/libc,rust-lang-nursery/libc,cactorium/libc,rust-lang/libc,rust-lang/libc,rust-lang/libc