GRK39B

Change-Id: Id36268001249167160dc7ea0908ddb85b69515a4
diff --git a/core/build_id.mk b/core/build_id.mk
index 1f20212..b79521a 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=GRK39
+export BUILD_ID=GRK39B