Add wingolog benchmarks

* Makefile: Add pflua-wingolog.png target.
* savefiles/wingolog.org.pcap.tests: Add expected tests.

* deps/pflua: Update.
Updates

* Makefile: Write to CSV files directly, without tee.
* savefiles/wingolog.org.pcap.tests: Add a couple "host" tests.

* deps/pflua: Update.  Currently on the unmerged optimize-host branch.