perf probe: Fix examples section of documentation

An example in perf-probe documentation for pattern of function name
based probe addition is not providing example command for that case.

This commit fixes the example to give appropriate example command.
Signed-off-by: SeongJae Park <sj38.park@gmail.com>
Acked-by: Masami Hiramatsu <mhiramat@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Taeung Song <treeze.taeung@gmail.com>
Fixes: ee391de8 ("perf probe: Update perf probe document")
Link: http://lkml.kernel.org/r/20170507103642.30560-1-sj38.park@gmail.comSigned-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

tools/perf/Documentation/perf-probe.txt

@@ -240,9 +240,13 @@ Add a probe on schedule() function 12th line with recording cpu local variable:
  or
  ./perf probe --add='schedule:12 cpu'
 
- this will add one or more probes which has the name start with "schedule".
+Add one or more probes which has the name start with "schedule".
 
- Add probes on lines in schedule() function which calls update_rq_clock().
+ ./perf probe schedule*
+ or
+ ./perf probe --add='schedule*'
+
+Add probes on lines in schedule() function which calls update_rq_clock().
 
  ./perf probe 'schedule;update_rq_clock*'
  or