Version bump to OPD1.170628.004

Change-Id: I5be870fb087a77717dee7fa505f8303ac1b03311
diff --git a/core/build_id.mk b/core/build_id.mk
index 914bf0d..e5a6b6b 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.
 
-export BUILD_ID=OPD1.170628.003
+export BUILD_ID=OPD1.170628.004