GRH20B

Change-Id: Ibc76f92280bb5db2013b6dccf8d85024e10c0ba1
diff --git a/core/build_id.mk b/core/build_id.mk
index 46a7603..041b185 100644
--- a/core/build_id.mk
+++ b/core/build_id.mk
@@ -19,4 +19,4 @@
 # (like "CRB01").  It must be a single word, and is
 # capitalized by convention.
 
-export BUILD_ID=GRH20
+export BUILD_ID=GRH20B