Version bump to OPD1.170706.004

Change-Id: Icace1db963958c2d92bf3f957515b6a7fc3b69c8
diff --git a/core/build_id.mk b/core/build_id.mk
index 7869220..5f345e1 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=OPD1.170706.003
+export BUILD_ID=OPD1.170706.004