Version bump to BP1A.241210.018.A1 [core/build_id.mk]

Change-Id: I791c8b78d80045ffc64d74bb76ec181a5f9170b3
diff --git a/core/build_id.mk b/core/build_id.mk
index cc05353..5ca834d 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.241210.018
+BUILD_ID=BP1A.241210.018.A1