Create C++ -> Python interface for calling LogReader

This provides an interface that allows the user to extract json data
from the logfiles directly into Python.

Change-Id: Iafd1e4ac2301befe1f8939b396d6e40a3133b2a2
diff --git a/aos/events/logging/logger.h b/aos/events/logging/logger.h
index 497dabb..b1f6718 100644
--- a/aos/events/logging/logger.h
+++ b/aos/events/logging/logger.h
@@ -93,6 +93,7 @@
 class LogReader {
  public:
   LogReader(absl::string_view filename);
+  ~LogReader();
 
   // Registers the timer and senders used to resend the messages from the log
   // file.