Raise security patch level to 2017-12-01

FPIIM-2226

Change-Id: I2d36f972d60207337022b3c4f1a53106e5f198b0
diff --git a/core/version_defaults.mk b/core/version_defaults.mk
index 71419b5..55e45ec 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 := 2017-11-06
+  PLATFORM_SECURITY_PATCH := 2017-12-01
 endif
 
 ifeq "" "$(PLATFORM_BASE_OS)"