Version bump to OPM4.171019.012

Change-Id: I982a1abf6b54004c70f34a103ed938fa241227d1
diff --git a/core/build_id.mk b/core/build_id.mk
index 3d8cba2..00b91d3 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=OPM4.171019.011
+export BUILD_ID=OPM4.171019.012