Version bump to BP1A.241210.031 [core/build_id.mk]

Change-Id: I7ad2806b816d11b4075a2405d07b020fda7eafdc
diff --git a/core/build_id.mk b/core/build_id.mk
index 116fd4a..c618cec 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.241210.030
+BUILD_ID=BP1A.241210.031