Make change and version bump to OPM2.171019.028

Change-Id: Idd27eb624cb1ef2a6e58c84de36b5d7144d71db5
diff --git a/core/build_id.mk b/core/build_id.mk
index f4db180..55c8358 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=OPM1.171019.025
+export BUILD_ID=OPM2.171019.028