AU: Update status to DOWNLOADING only after receiving some bytes from server.

update_engine_client.cc

Index: update_engine_client.cc
diff --git a/update_engine_client.cc b/update_engine_client.cc
index e25d313ddabcdd30a58c8e15bf169370c8a9fbe2..a55820ae94f28eb781f198c215dcf92f8031e697 100644
--- a/update_engine_client.cc
+++ b/update_engine_client.cc
@@ -234,7 +234,7 @@ int main(int argc, char** argv) {
 
     // Wait for an update to complete.
     if (FLAGS_update) {
-      LOG(INFO) << "Waiting for update the complete.";
+      LOG(INFO) << "Waiting for update to complete.";
       CompleteUpdate();  // Should never return.
       return 1;
     }