initial add - go fmt on grpc

Change-Id: Ib0afadd2fe5571d1456a091f94f5644458f7d3f4
diff --git a/vendor/google.golang.org/grpc/AUTHORS b/vendor/google.golang.org/grpc/AUTHORS
new file mode 100644
index 0000000..e491a9e
--- /dev/null
+++ b/vendor/google.golang.org/grpc/AUTHORS
@@ -0,0 +1 @@
+Google Inc.