rs6000-record: Complete op31.
rs6000-record: Complete op19.
rs6000-record: Add DFP instructions.
rs6000-record: Complete op59 and op63.
rs6000-record: op4.
rs6000-record: Implement process_record_signal.

   * Implement process_record_signal.
   * Add comments for ioctl/syscall numbers.
rs6000-record: Chapter 5. Vector Facility [Category: Vector]