Version bump to BP1A.241210.028.A1 [core/build_id.mk]

Change-Id: I8b34c1acb05a88d18cae1a16385a3e97517e44fa
diff --git a/core/build_id.mk b/core/build_id.mk
index 4100bd7..0779cce 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.241210.028
+BUILD_ID=BP1A.241210.028.A1