code: function get_cpu_arch(major, minor) {
    if (major === CPU_TYPE_ARM64) {
      return 'arm64';
    }
  
    if (major === CPU_TYPE_X86) {
      return 'i386';
    }
  
    if (major === CPU_TYPE_X86_64) {
      return 'x86_64';
    }
  
    if (major === CPU_TYPE_ARM) {
      return CPU_ARM_TYPES[minor] || 'arm';
    }
  
    return `unknown(${major},${minor})`
  }
docs: Finds the CPU arch name using a major/minor type
  number. If we can't find the arch, we just wrap
  the major/minor in an "unknown()" binding.
  
  @param major the major CPU type.
  @param minor the minor CPU type.
  @returns {*} the arch of the CPU type.