Version bump to QP1A.190228.004

Change-Id: I99af43e3f2016651813d0fe678ed9ab85aa566fb
diff --git a/core/build_id.mk b/core/build_id.mk
index f6c8f96..fa1fac9 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.190228.003
+BUILD_ID=QP1A.190228.004