Make change and version bump to OPM2.171019.015

Change-Id: I883ff062f2e53dc3f9d4f90d302ddceac83331e0
diff --git a/core/build_id.mk b/core/build_id.mk
index 1714f7c..27bc596 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=OPM1.171019.014
+export BUILD_ID=OPM2.171019.015