trace-cmd: Fix a typo in warning messages

There is a typo in few trace-cmd warning messages:
 "cound not" -> "could not"

Link: http://lore.kernel.org/linux-trace-devel/20190725105731.28782-1-tz.stoyanov@gmail.com

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