proc: uid_cputime: fix show_uid_stat permission

Signed-off-by: Jin Qian <jinqian@google.com>

drivers/misc/uid_cputime.c

@@ -242,7 +242,7 @@ static int __init proc_uid_cputime_init(void)
 	proc_create_data("remove_uid_range", S_IWUGO, parent, &uid_remove_fops,
 					NULL);
 
-	proc_create_data("show_uid_stat", S_IWUGO, parent, &uid_stat_fops,
+	proc_create_data("show_uid_stat", S_IRUGO, parent, &uid_stat_fops,
 					NULL);
 
 	thread_register_notifier(&process_notifier_block);