trace-cmd: Implement new sub-command "dump"

The new trace-cmd sub-command "dump" prints all meta data
information, stored in a trace file. It also can be used
to check if a file is a valid trace file, created by trace-cmd.

Link: http://lore.kernel.org/linux-trace-devel/20200109122055.286290-2-tz.stoyanov@gmail.com

Signed-off-by: Tzvetomir Stoyanov (VMware) <tz.stoyanov@gmail.com>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
5 files changed