trace-cmd: Refactor print_update

Match utils.mk convention and use a conditional macro for printing
'UPDATE' messages.

Link: http://lore.kernel.org/linux-trace-devel/20191025063957.21558-1-gthelen@google.com

Signed-off-by: Greg Thelen <gthelen@google.com>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
1 file changed