[DO NOT MERGE] Updating Security String to 2017-09-05 Bug:63846344
(cherry picked from commit 18be90844245f3873261e4aa1072e8d83fdb33aa)

Change-Id: Idd570cec07ed82361d6023227a38c48ba71a7714
diff --git a/core/version_defaults.mk b/core/version_defaults.mk
index 98b74ba..befd346 100644
--- a/core/version_defaults.mk
+++ b/core/version_defaults.mk
@@ -114,7 +114,7 @@
     #  It must be of the form "YYYY-MM-DD" on production devices.
     #  It must match one of the Android Security Patch Level strings of the Public Security Bulletins.
     #  If there is no $PLATFORM_SECURITY_PATCH set, keep it empty.
-    PLATFORM_SECURITY_PATCH := 2017-09-01
+    PLATFORM_SECURITY_PATCH := 2017-09-05
 endif
 
 ifeq "" "$(PLATFORM_BASE_OS)"