Version bump to BP1A.250405.005.B1 [core/build_id.mk]

Change-Id: Ia61e74593908644e3baf5ded44d2056d9ea8f9b4
diff --git a/core/build_id.mk b/core/build_id.mk
index b741873..31e56be 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=BP1A.250405.005
+BUILD_ID=BP1A.250405.005.B1