Version bump to OPD2.170816.015

Change-Id: I7e9fbcd749ffee508f835c68e89ceab46c11d74e
diff --git a/core/build_id.mk b/core/build_id.mk
index 253f823..623f345 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=OPD2.170816.014
+export BUILD_ID=OPD2.170816.015