Version bump to QP1A.190711.020 [core/build_id.mk]

Change-Id: I7d6a93de1023aede26137adeba5eb69cc67c8821
diff --git a/core/build_id.mk b/core/build_id.mk
index b5a821b..53a3460 100644
--- a/core/build_id.mk
+++ b/core/build_id.mk
@@ -18,4 +18,4 @@
 # (like "CRB01").  It must be a single word, and is
 # capitalized by convention.
 
-BUILD_ID=QP1A.190711.019
+BUILD_ID=QP1A.190711.020