Version bump to OPD1.170601.006

Change-Id: I1e82bf9b6a5c05ad23634248e38a566ea50cdc2e
diff --git a/core/build_id.mk b/core/build_id.mk
index 9b3931f..e935431 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=OPD1.170601.005
+export BUILD_ID=OPD1.170601.006