Ignore newer kernel constants if building with musl
Ignore newer kernel constants if building with musl

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