How to compile with Bluez 5.5x?

Hello!

I'm trying to figure out how to compile your btmidi-server with `bluez-5.52`.

I modified Makefile.tools and added what appeared to be the relevant parts from your Bluez fork (the `if MIDI` statements). However I don't end up with a btmidi-server executable after making.

Can you suggest how best to compile btmidi-server with `bluez-5.52`?  Thanks!