Version bump to RP1A.200420.002 [core/build_id.mk]

Change-Id: I6b2534ff079caba4df9e303c2a351bd29feb2712
diff --git a/core/build_id.mk b/core/build_id.mk
index c6efb77..d00d022 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=RP1A.200420.001
+BUILD_ID=RP1A.200420.002