trace-cmd: Man page of trace-cmd clear subcommand

Added man page describing trace-cmd clear subcommand.

Link: https://lore.kernel.org/linux-trace-devel/20200717075741.74775-2-tz.stoyanov@gmail.com

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