Update Security String to 2016-10-01 to platform and CTS for October Security

Change-Id: I7ccdd54c1d269422c5e2e1f3e268fc539b6eb684
diff --git a/core/version_defaults.mk b/core/version_defaults.mk
index ac017a2..1b3c7d8 100644
--- a/core/version_defaults.mk
+++ b/core/version_defaults.mk
@@ -103,7 +103,7 @@
   # 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 := 2016-09-01
+  PLATFORM_SECURITY_PATCH := 2016-10-01
 endif
 
 ifeq "" "$(PLATFORM_BASE_OS)"