Convert aos over to flatbuffers

Everything builds, and all the tests pass.  I suspect that some entries
are missing from the config files, but those will be found pretty
quickly on startup.

There is no logging or live introspection of queue messages.

Change-Id: I496ee01ed68f202c7851bed7e8786cee30df29f5
diff --git a/aos/testing/gtest_main.cc b/aos/testing/gtest_main.cc
index c8c5062..52159c3 100644
--- a/aos/testing/gtest_main.cc
+++ b/aos/testing/gtest_main.cc
@@ -25,6 +25,7 @@
   FLAGS_logtostderr = true;
   google::InitGoogleLogging(argv[0]);
   ::gflags::ParseCommandLineFlags(&argc, &argv, false);
+  google::InstallFailureSignalHandler();
 
   if (FLAGS_print_logs) {
     if (::aos::testing::ForcePrintLogsDuringTests) {