perf annotate: Handle lower case key code in annotate_browser__run()

Accepting upper case character only is unconvenient since it requires
SHIFT key too. Why not change to it accept a simple key stroke?

Cc: Ingo Molnar <mingo@elte.hu>
Cc: Namhyung Kim <namhyung@gmail.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/1329986784-4916-3-git-send-email-namhyung.kim@lge.com
Signed-off-by: Namhyung Kim <namhyung.kim@lge.com>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

tools/perf/util/ui/browsers/annotate.c

@@ -287,9 +287,11 @@ static int annotate_browser__run(struct annotate_browser *self, int evidx,
 				nd = self->curr_hot;
 			break;
 		case 'H':
+		case 'h':
 			nd = self->curr_hot;
 			break;
 		case 'S':
+		case 's':
 			if (annotate_browser__toggle_source(self))
 				ui_helpline__puts(help);
 			continue;