Update Security String to 2016-09-06 to platform and CTS for September Security (+Quadrooter,-PZ) am: fa721839b2 am: fdf4c8d8a6 am: 21b4d9e01c am: 1f85078b1e am: 782967785e
am: 7171325d0b

Change-Id: I114a7c8b86cdddbe1333ceb8ac7668c3ae0b8d10
diff --git a/core/version_defaults.mk b/core/version_defaults.mk
index f207185..a61c976 100644
--- a/core/version_defaults.mk
+++ b/core/version_defaults.mk
@@ -113,7 +113,7 @@
   # Must be of the form "YYYY-MM-DD" on production devices.
   #
   # If there is no $PLATFORM_SECURITY_PATCH set, keep it empty.
-  PLATFORM_SECURITY_PATCH := 2016-09-07
+  PLATFORM_SECURITY_PATCH := 2016-09-06
 endif
 
 ifeq "" "$(PLATFORM_BASE_OS)"