message: fix use statement
diff: @@ -217,7 +217,7 @@ pub fn exit(failure: bool) -> ! {
  /// Debug exit from qemu with a returncode
  /// '-device', 'isa-debug-exit,iobase=0xf4,iosize=0x04' must be passed to qemu for this to work
  pub fn exit_qemu(exit_code: QemuExitCode) -> ! {
  - use x86_64::instructions::port::Port;
  + use x86::io::outl;
  unsafe {
  outl(0xf4, exit_code as u32);
  