Use a bool for ForceDefaults instead of an int

The actual function takes a bool.

While we are doing this, add a couple missing ForceDefaults.

Change-Id: I7fd41c048dae340ca4f339230ceb033349db0faf
diff --git a/aos/events/logging/log_edit.cc b/aos/events/logging/log_edit.cc
index 5db503a..02b7bd7 100644
--- a/aos/events/logging/log_edit.cc
+++ b/aos/events/logging/log_edit.cc
@@ -27,7 +27,7 @@
       const ::std::string header_json =
           aos::util::ReadFileToStringOrDie(FLAGS_header);
       flatbuffers::FlatBufferBuilder fbb;
-      fbb.ForceDefaults(1);
+      fbb.ForceDefaults(true);
       flatbuffers::Offset<aos::logger::LogFileHeader> header =
           aos::JsonToFlatbuffer<aos::logger::LogFileHeader>(header_json, &fbb);