Update security patch string to 2016-06-01

b/28269112

Change-Id: Icf65bbf784951d1f9b56ce88f59b50661af1a32c
diff --git a/core/version_defaults.mk b/core/version_defaults.mk
index c91315e..b621926 100644
--- a/core/version_defaults.mk
+++ b/core/version_defaults.mk
@@ -73,7 +73,7 @@
   # Can be an arbitrary string, but must be a single word.
   #
   # If there is no $PLATFORM_SECURITY_PATCH set, keep it empty.
-  PLATFORM_SECURITY_PATCH := 2016-05-01
+  PLATFORM_SECURITY_PATCH := 2016-06-01
 endif
 
 ifeq "" "$(PLATFORM_BASE_OS)"