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/third_party/eigen/BUILD b/third_party/eigen/BUILD
index e66382c..54c5cd1 100644
--- a/third_party/eigen/BUILD
+++ b/third_party/eigen/BUILD
@@ -1,6 +1,6 @@
 licenses(["notice"])
 
-load("//tools:environments.bzl", "mcu_cpus")
+load("@//tools:environments.bzl", "mcu_cpus")
 
 cc_library(
     name = "eigen",