[RFA] Prec: add x86 insn rdtsc

[Mark Kettenis]

> From: Hui Zhu <teawater@gmail.com>
> Date: Thu, 8 Apr 2010 14:52:50 +0800
> 
> Update follow cvs-head.
> Please help me review it.
> 
> Thanks,
> Hui
> 
> 2010-04-08  Hui Zhu  <teawater@gmail.com>
> 
> 	* i386-tdep.c (i386_process_record): Add support for insn
> 	rdtsc.

Fine with me (although I suspect some funny interactions if you
actually start using process record on software that really uses this
instruction).