Version bump to OPM2.170911.004

Change-Id: I15f861508911db1d24cea5c8d4840db5e0f54090
diff --git a/core/build_id.mk b/core/build_id.mk
index 0e05513..8981868 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=OPM2.170911.003
+export BUILD_ID=OPM2.170911.004