trace-graph: Add new cmdlines via sched_switch
trace-graph: Add new cmdlines via sched_switch

The cmdline cache used by ftrace only saves 100 cmdlines. But if
there's more tasks than cmdlines, then we will end up with a lot with
<...>. This looks at sched_switch and will add comms if they are found.

Signed-off-by: Steven Rostedt <43232e92d70cc7aa53504ad0397085ee47bad87f@goodmis.org>

bigzz/trace-cmd,bigzz/trace-cmd