Add more structs
Add more structs

This adds more structs to the uclibc/x86_64 port.

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