Update Security String to 2020-08-05

Bug: 158587413
Change-Id: I5f0b271fb5302e8c72024b49fb1a2ae5120821e0
(cherry picked from commit d4b7f4de4b77aac978cc1475b937552d6d42a310)
diff --git a/core/version_defaults.mk b/core/version_defaults.mk
index c168b44..9f64081 100644
--- a/core/version_defaults.mk
+++ b/core/version_defaults.mk
@@ -250,7 +250,7 @@
     #  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 := 2020-08-01
+      PLATFORM_SECURITY_PATCH := 2020-08-05
 endif
 .KATI_READONLY := PLATFORM_SECURITY_PATCH