Add pi4 and laptop

Pi's on 3 sides + 1 on the turret.  laptop will be the logger node at
some point in the future.

To do this, we need to edit the log file header again for the test
data...

Change-Id: I7a39d6644882e4c96dca1d689183295534d3aab4
diff --git a/aos/events/event_loop.cc b/aos/events/event_loop.cc
index 2ffad3b..c03425e 100644
--- a/aos/events/event_loop.cc
+++ b/aos/events/event_loop.cc
@@ -399,6 +399,9 @@
     const Channel *channel = configuration::GetChannel(
         configuration(), "/aos", timing::Report::GetFullyQualifiedName(),
         name(), node());
+    CHECK(channel != nullptr) << ": Failed to look up {\"name\": \"/aos\", "
+                                 "\"type\": \"aos.timing.Report\"} on node "
+                              << FlatbufferToJson(node());
 
     // Since we are using a RawSender, validity isn't checked.  So check it
     // ourselves.