Version bump to OPD1.170608.004

Change-Id: I7773bc7332f4befa8ff89f69104158e107b62fef
diff --git a/core/build_id.mk b/core/build_id.mk
index 0539e1f..354e21c 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=OPD1.170608.003
+export BUILD_ID=OPD1.170608.004