Make change and version bump to OPM4.171019.016.A1

Change-Id: I008116f33d36430b0830d7f0887098b60359e56b
diff --git a/core/build_id.mk b/core/build_id.mk
index a1102dd..c8a6ddb 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=OPM4.171019.016
+export BUILD_ID=OPM4.171019.016.A1