Version bump to OPD1.170720.006

Change-Id: Ifdd78f96d6b99dcd3d1b4938cea8f31eaeb6ed3f
diff --git a/core/build_id.mk b/core/build_id.mk
index 71d2443..29f0e4f 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=OPD1.170720.005
+export BUILD_ID=OPD1.170720.006