Make change and version bump to OPM4.171019.015

Change-Id: I66c0492a9c42c497d1d1e78c2f338db05c631f4b
diff --git a/core/build_id.mk b/core/build_id.mk
index 0f79a94..0ddf9c3 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=OPM4.171019.014
+export BUILD_ID=OPM4.171019.015