[Crash-utility] maintenance of trace.c extension module

[Fei, Jie/费 杰]

Hello Dave,

I'm Qiao Nuohan's colleague at FNST. Since Qiao now is busy with other work
and doesn't have time to maintain trace.c, I'd like to be the maintainer 
of this module
from now on. And I'm working on the code of trace.c and Kyle's patches now.

Thanks,
Fei