am a78d357d: am a9b2f303: am 124a59ae: Reverting Android Security Patch Level string back to 2015-10-01

* commit 'a78d357d185c1bd45e52ad110d59b53540f2949c':
  Reverting Android Security Patch Level string back to 2015-10-01
diff --git a/core/version_defaults.mk b/core/version_defaults.mk
index 39760dc..dcc1e18 100644
--- a/core/version_defaults.mk
+++ b/core/version_defaults.mk
@@ -104,7 +104,7 @@
   # 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 := 2015-11-01
+  PLATFORM_SECURITY_PATCH := 2015-10-01
 endif
 
 ifeq "" "$(PLATFORM_BASE_OS)"