Version bump to SP2A.210331.002 [core/build_id.mk]

Change-Id: I10e59e7b29f6226c580ed4ef96abb04069592e53
diff --git a/core/build_id.mk b/core/build_id.mk
index 5e5bb77..6833df4 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=SP2A.210331.001
+BUILD_ID=SP2A.210331.002