Version bump to OPR4.170623.006

Change-Id: Ic572804e3d5e279e1e94643aac9fcadb346563ee
diff --git a/core/build_id.mk b/core/build_id.mk
index 9feef04..253ca19 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=OPR4.170623.005
+export BUILD_ID=OPR4.170623.006