message: Disable specialization on x86_64
diff: #![feature(asm_const)]
  #![feature(linked_list_cursors)]
  #![feature(naked_functions)]
  -#![feature(specialization)]
  +#![cfg_attr(target_arch = "aarch64", feature(specialization))]
  #![feature(strict_provenance)]
  #![cfg_attr(target_os = "none", no_std)]
  #![cfg_attr(target_os = "none", feature(custom_test_frameworks))]
  