perf tools: Fix a memory leak on perf_read_values_destroy

After freeing each elements of the @values->value, we should free itself
too.

Cc: Ingo Molnar <mingo@elte.hu>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/1323703017-6060-5-git-send-email-namhyung@gmail.com
Signed-off-by: Namhyung Kim <namhyung@gmail.com>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
diff --git a/tools/perf/util/values.c b/tools/perf/util/values.c
index bdd3347..697c8b4 100644
--- a/tools/perf/util/values.c
+++ b/tools/perf/util/values.c
@@ -32,6 +32,7 @@
 
 	for (i = 0; i < values->threads; i++)
 		free(values->value[i]);
+	free(values->value);
 	free(values->pid);
 	free(values->tid);
 	free(values->counterrawid);