Version bump to OPD1.170504.006

Change-Id: I572e51bec7624ecf7a9711c04ff3d166b69300d8
diff --git a/core/build_id.mk b/core/build_id.mk
index 34138ef..5a213ce 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=OPD1.170504.005
+export BUILD_ID=OPD1.170504.006