Add remote_boot_uuid to Context

This lets us track which boot a message came from and finally fix the
logger relying on ServerStatistics having all the required information
needed to build up the logfile header.

Change-Id: I17fc4c5718d5d69c7a1e154afdd83b1ccb388a8f
diff --git a/aos/events/simulated_network_bridge.cc b/aos/events/simulated_network_bridge.cc
index e5eb4cb..eb7f243 100644
--- a/aos/events/simulated_network_bridge.cc
+++ b/aos/events/simulated_network_bridge.cc
@@ -136,7 +136,8 @@
     sender_->Send(fetcher_->context().data, fetcher_->context().size,
                   fetcher_->context().monotonic_event_time,
                   fetcher_->context().realtime_event_time,
-                  fetcher_->context().queue_index);
+                  fetcher_->context().queue_index,
+                  fetcher_->context().remote_boot_uuid);
 
     // And simulate message_bridge's offset recovery.
     client_status_->SampleFilter(client_index_,