Version bump to BP1A.250405.007.B1 [core/build_id.mk]

Change-Id: I0e0dee5abe7d4764ca35ae01dcc924c50584e9aa
diff --git a/core/build_id.mk b/core/build_id.mk
index 1d143ac..41b4466 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.250405.007
+BUILD_ID=BP1A.250405.007.B1