perf annotate: Make local period the default percent type

Currently we display the percentages in annotation output based on
number of samples hits. Switching it to period based percentage by
default, because it corresponds more to the time spent on the line.

Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/r/20180804130521.11408-18-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

tools/perf/util/annotate.c

@@ -49,7 +49,7 @@ struct annotation_options annotation__default_options = {
 	.jump_arrows    = true,
 	.annotate_src	= true,
 	.offset_level	= ANNOTATION__OFFSET_JUMP_TARGETS,
-	.percent_type	= PERCENT_HITS_LOCAL,
+	.percent_type	= PERCENT_PERIOD_LOCAL,
 };
 
 static regex_t	 file_lineno;