Version bump to QD4A.200317.020 [core/build_id.mk]

Change-Id: I96403069a9cbe91fd8a0b8439d5e93318281b0fb
diff --git a/core/build_id.mk b/core/build_id.mk
index dc65abd..66ed71e 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=QD4A.200317.019
+BUILD_ID=QD4A.200317.020