1129817 - prepend process id and thread id if line is split

By including a unique identifier, it is possible to separate logs that are generated at the same time.

 [Bugzilla-1129817](https://bugzilla.redhat.com/show_bug.cgi?id=1129817)
It might be nice for formatting to insert a space at the end of the log_id here so that there's a space between the message id and the log message, for readability.