Version bump to BP2A.250605.015.X2 [core/build_id.mk]

Change-Id: I56f048a3ce9443781aab95703f43beee3eda71b7
diff --git a/core/build_id.mk b/core/build_id.mk
index 4f39cd4..2c0c2c4 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=BP2A.250605.015.X1
+BUILD_ID=BP2A.250605.015.X2