Update the x86 crate.

Cargo.lock

Cargo.toml

src/arch/x86_64/device/local_apic.rs

src/arch/x86_64/gdt.rs

src/arch/x86_64/idt.rs

src/arch/x86_64/interrupt/ipi.rs

src/arch/x86_64/interrupt/syscall.rs

src/arch/x86_64/paging/mod.rs