Log the timestamp each part file is created too

This gives us another tool for helping figure out which boot came first,
and also debug how/when log parts are written.

Change-Id: I015a5024ceaa3b95af7ff621de706ef16cff55e8
Signed-off-by: Austin Schuh <austin.schuh@bluerivertech.com>
diff --git a/aos/events/logging/log_writer.h b/aos/events/logging/log_writer.h
index a93da7d..f624028 100644
--- a/aos/events/logging/log_writer.h
+++ b/aos/events/logging/log_writer.h
@@ -149,8 +149,7 @@
   // starts.
   void StartLoggingLocalNamerOnRun(std::string base_name) {
     event_loop_->OnRun([this, base_name]() {
-      StartLogging(std::make_unique<LocalLogNamer>(
-          base_name, event_loop_->configuration(), event_loop_->node()));
+      StartLogging(std::make_unique<LocalLogNamer>(base_name, event_loop_));
     });
   }
 
@@ -158,8 +157,7 @@
   // processing starts.
   void StartLoggingOnRun(std::string base_name) {
     event_loop_->OnRun([this, base_name]() {
-      StartLogging(std::make_unique<MultiNodeLogNamer>(
-          base_name, event_loop_->configuration(), event_loop_->node()));
+      StartLogging(std::make_unique<MultiNodeLogNamer>(base_name, event_loop_));
     });
   }