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/ipc_lib/BUILD b/aos/ipc_lib/BUILD
index 026f866..c24fcee 100644
--- a/aos/ipc_lib/BUILD
+++ b/aos/ipc_lib/BUILD
@@ -175,6 +175,7 @@
         ":data_alignment",
         ":index",
         "//aos:realtime",
+        "//aos:uuid",
         "//aos/time",
         "//aos/util:compiler_memory_barrier",
         "@com_github_google_glog//:glog",