Update platform security string to 2018-10-05 on pi-dev & master
bug: 112535135
diff --git a/core/version_defaults.mk b/core/version_defaults.mk
index 3c1c3c9..3199c09 100644
--- a/core/version_defaults.mk
+++ b/core/version_defaults.mk
@@ -231,7 +231,7 @@
     #  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 := 2018-09-05
+      PLATFORM_SECURITY_PATCH := 2018-10-05
 endif
 
 ifndef PLATFORM_SECURITY_PATCH_TIMESTAMP