Version bump to QP1A.181018.004

Change-Id: Ib6ce72544c74eca26ae165e95467529324cf7a52
diff --git a/core/build_id.mk b/core/build_id.mk
index 69fd3de..4558aaa 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=QP1A.181018.003
+BUILD_ID=QP1A.181018.004