message: Add i386 __restore_rt
diff: use core::arch::global_asm;
  +// x8 is register, 119 is SIGRETURN
  +#[cfg(target_arch = "aarch64")]
  +global_asm!(
  + "
  + .global __restore_rt
  + __restore_rt:
  + mov x8, #119
  + svc 0
  +"
  +);
  // Needs to be defined in assembly because it can't have a function prologue
  -// rax is register, 119 is SIGRETURN
  -#[cfg(target_arch = "x86_64")]
  +// eax is register, 119 is SIGRETURN
  +#[cfg(target_arch = "x86")]
  global_asm!(
  "
  .global __restore_rt
  __restore_rt:
  - mov rax, 119
  - syscall
  + mov eax, 119
  + int 0x80
  "
  );
  -// x8 is register, 119 is SIGRETURN
  -#[cfg(target_arch = "aarch64")]
  +// Needs to be defined in assembly because it can't have a function prologue
  +// rax is register, 119 is SIGRETURN
  +#[cfg(target_arch = "x86_64")]
  global_asm!(
  "
  .global __restore_rt
  __restore_rt:
  - mov x8, #119
  - svc 0
  + mov rax, 119
  + syscall
  "
  );
  