Update godeps for etcd 3.0.4

vendor/github.com/grpc-ecosystem/grpc-gateway/runtime/internal/stream_chunk.proto

@@ -0,0 +1,12 @@
+syntax = "proto3";
+package grpc.gateway.runtime;
+option go_package = "internal";
+
+// StreamError is a response type which is returned when
+// streaming rpc returns an error.
+message StreamError {
+	int32 grpc_code = 1;
+	int32 http_code = 2;
+	string message = 3;
+	string http_status = 4;
+}