Update Security String to 2017-05-05 on nyc-dev

Bug:34137924
(cherry picked from commit cfdcc41cd73360c9605407508a285c905d196fd5)
diff --git a/core/version_defaults.mk b/core/version_defaults.mk
index 1e10edc..0b55b3f 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 := 2017-05-01
+      PLATFORM_SECURITY_PATCH := 2017-05-05
 endif
 
 ifeq "" "$(PLATFORM_BASE_OS)"