Updating security patch string to 2016-03-01

b/26499556

Change-Id: I18a5ad9d8d08e2050053bcebc1a9a0c46db86733
diff --git a/core/version_defaults.mk b/core/version_defaults.mk
index 4b86e72..4750528 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 := 2016-02-01
+  PLATFORM_SECURITY_PATCH := 2016-03-01
 endif
 
 ifeq "" "$(PLATFORM_BASE_OS)"