old_contents: 
  #
  # offsets in struct _IO_FILE
  #
  _IO_FILE = {
      'X86': {
          'fd': 0x38,
      },
      'X64': {
          'fd': 0x70,
      },
  }
new_contents: 
  #
  # offsets in struct _IO_FILE
  #
  _IO_FILE = {
      'X86': {
          'fd': 0x38,
      },
      'AMD64': {
          'fd': 0x70,
      },
  }
subject: Rename X64 to AMD64 in libc SimProcedures to be consistent with architecture names in archinfo