Add support for multiple hostnames for a given node

This will be useful both on a roboRIO and to allow encoding the team
number in the hostnames on the Pis.

Change-Id: I3975785240d7502bc3922c92e9faad4bdadda0d9
diff --git a/aos/BUILD b/aos/BUILD
index ac5c3e9..47de872 100644
--- a/aos/BUILD
+++ b/aos/BUILD
@@ -475,6 +475,7 @@
         "testdata/expected.json",
         "testdata/expected_multinode.json",
         "testdata/good_multinode.json",
+        "testdata/good_multinode_hostnames.json",
         "testdata/invalid_destination_node.json",
         "testdata/invalid_nodes.json",
         "testdata/invalid_source_node.json",