Update to bitflags 1.0

Cargo.lock

Cargo.toml

src/acpi/dmar/mod.rs

src/acpi/hpet.rs

src/acpi/madt.rs

src/acpi/mod.rs

src/acpi/rsdp.rs

src/arch/x86_64/device/local_apic.rs

src/arch/x86_64/idt.rs

src/arch/x86_64/paging/entry.rs

src/arch/x86_64/paging/mapper.rs

src/arch/x86_64/paging/mod.rs

src/arch/x86_64/paging/table.rs

src/arch/x86_64/start.rs

src/context/memory.rs

src/devices/uart_16550.rs

src/scheme/user.rs

src/syscall/driver.rs

src/syscall/process.rs

src/syscall/validate.rs