[Crash-utility] Add an option "-c" for commamd runq

Hello Dave, The patch is used to improve the existing command, which adds an option "-c" to the the command "runq". The option "-c" displays the timestamp information about the runqueue each of cpu. The timstamp information, which accordings to the kernel version you use, may be the value of runqueue's member. for example, rq.clock or rq.timestamp_last_tick, even runqueue.timestamp_last_tick. Besides, I have already tested it on rhel4.8/rehl5.7/rhel6.2, without any error. The result like this: Regards, Wei Jiangang