[VOL-3979] Using latest protos and voltha-lib-go

Change-Id: I7544801f675733049a5c8af26546ec24a6652bef
diff --git a/VERSION b/VERSION
index e20c784..9edc58b 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-1.6.4-dev
+1.6.4