gRPC migration update

Change-Id: Icdd1a824948fa994cd36bd121c962f5ecf74e3cf
diff --git a/vendor/go.uber.org/multierr/.gitignore b/vendor/go.uber.org/multierr/.gitignore
index 61ead86..b9a05e3 100644
--- a/vendor/go.uber.org/multierr/.gitignore
+++ b/vendor/go.uber.org/multierr/.gitignore
@@ -1 +1,4 @@
 /vendor
+cover.html
+cover.out
+/bin