Version bump to RD1A.200810.021.B1 [core/build_id.mk]

Change-Id: I7fca62bb9132ae0efbea61eb4577b196c8545fd1
diff --git a/core/build_id.mk b/core/build_id.mk
index 9a6ec12..1854ff2 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=RD1A.200810.021
+BUILD_ID=RD1A.200810.021.B1