Bump classes/system revision

Change-Id: If6a1a178d000bea3023a1f867da9c614a19b397d
diff --git a/classes/system b/classes/system
index a3909e2..6320d70 160000
--- a/classes/system
+++ b/classes/system
@@ -1 +1 @@
-Subproject commit a3909e204580639b864070a0d5c2130bea26df3f
+Subproject commit 6320d70d52fda38b989dfdb91621f52c16f27f97