Bump classes/system

Change-Id: Icdf717c8461cd191d000a47ac93e3300b7407b6c
diff --git a/classes/system b/classes/system
index e479a9f..70f7f59 160000
--- a/classes/system
+++ b/classes/system
@@ -1 +1 @@
-Subproject commit e479a9f877522b61f418e5642f47ca3edffef8d9
+Subproject commit 70f7f5915dabf37b49b954514ecec0778578536c