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

Change-Id: I7ccdd54c1d269422c5e2e1f3e268fc539b6eb684
(cherry picked from commit cb60b2dedbf6a346f3affc66a2e89a8068c530e2)
diff --git a/core/build_id.mk b/core/build_id.mk
index e9b9179..336f112 100644
--- a/core/build_id.mk
+++ b/core/build_id.mk
@@ -18,4 +18,4 @@
 # (like "CRB01").  It must be a single word, and is
 # capitalized by convention.
 
-export BUILD_ID=M4B30T
+export BUILD_ID=M4B30U
diff --git a/core/version_defaults.mk b/core/version_defaults.mk
index cb8ba51..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 := 2016-07-05
+  PLATFORM_SECURITY_PATCH := 2016-10-01
 endif
 
 ifeq "" "$(PLATFORM_BASE_OS)"