perf/trace/scripting: don't show script start/stop messages by default

Only print the script start/stop messages in verbose mode - users
normally don't care and it just clutters up the output.

Cc: Frédéric Weisbecker <fweisbec@gmail.com>
Cc: Ingo Molnar <mingo@elte.hu>
LKML-Reference: <1273466820-9330-7-git-send-email-tzanussi@gmail.com>
Signed-off-by: Tom Zanussi <tzanussi@gmail.com>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
diff --git a/tools/perf/builtin-trace.c b/tools/perf/builtin-trace.c
index 6e268ca..95fcb05 100644
--- a/tools/perf/builtin-trace.c
+++ b/tools/perf/builtin-trace.c
@@ -53,6 +53,8 @@
 
 static int cleanup_scripting(void)
 {
+	pr_debug("\nperf trace script stopped\n");
+
 	return scripting_ops->stop_script();
 }
 
@@ -703,6 +705,7 @@
 		err = scripting_ops->start_script(script_name, argc, argv);
 		if (err)
 			goto out;
+		pr_debug("perf trace started with script %s\n\n", script_name);
 	}
 
 	err = __cmd_trace(session);