Version bump to OPR2.170821.002

Change-Id: Ib8e220cdad49339251d34a77b9b528d2bbaea088
diff --git a/core/build_id.mk b/core/build_id.mk
index 5d6a161..e90d45a 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=OPR2.170821.001
+export BUILD_ID=OPR2.170821.002