Version bump to BP1A.250405.001.X1 [core/build_id.mk]

Change-Id: If5b71f8514414fb5ef697fe28ed9cca1d6c230cb
diff --git a/core/build_id.mk b/core/build_id.mk
index f29e245..100107b 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.250405.001
+BUILD_ID=BP1A.250405.001.X1