Version bump to BP1A.250505.004.A1 [core/build_id.mk]

Change-Id: Ib49698eab8a0818418399870b9169ba2fb3776fa
diff --git a/core/build_id.mk b/core/build_id.mk
index ebf668b..f3a9c09 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.250505.004
+BUILD_ID=BP1A.250505.004.A1