Version bump to QP1A.190401.004

Change-Id: I34a49092f793b88d1ab547b035e0e9f83125084a
diff --git a/core/build_id.mk b/core/build_id.mk
index 6de16a2..88757c0 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.190401.003
+BUILD_ID=QP1A.190401.004