Lock profiling and lock order verification status report, week 8

[Greg Miller]

Accomplishments for the week:

* Finished cleaning up and converting my tests for lock profiling, and
added them to the tree
* Implemented logging and retrieval of LoR information
* Added tests for libwitness
* Fixed a few bugs in both libraries

My plan for this week is to implement naming of locks in libwitness
and finish a few remaining support API functions.

Pending concern: A hang in the lock profiling tests has been reported,
and I've not been able to reproduce it in VirtualBox or on real
hardware yet.