Update Security String to 2019-05-05 in oc-m8-release
Bug:128322951
(cherry picked from commit fa69b7c84a0aa22db03ccb47908ba691764b6437)

Change-Id: I802f2acad07191b2f525a3736817b49a83c0f154
diff --git a/core/version_defaults.mk b/core/version_defaults.mk
index 8ce30f6..5193eb2 100644
--- a/core/version_defaults.mk
+++ b/core/version_defaults.mk
@@ -181,7 +181,7 @@
     #  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 := 2019-05-01
+      PLATFORM_SECURITY_PATCH := 2019-05-05
 endif
 
 ifndef PLATFORM_BASE_OS