Make the DDUMP tracing feature output the cycle number and

Make the DDUMP tracing feature output the cycle number and
the object name on every line.
This makes grep a bit more effective.

kern/tru64/dump_mbuf.cc:
    use the new data dump format that trace.hh now provides

--HG--
extra : convert_revision : 179efa96aaff9da710baae13c9e981975d2abdc1