Now HydraBus is supported officially in blacksphere/blackmagic github
Thanks to Gareth McMullin and please support his amazing Black Magic Probe hardware.

See documentation here:
https://github.com/blacksphere/blackmagic/tree/master/src/platforms/hydrabus

For more details see:
See https://github.com/blacksphere/blackmagic/pull/125

See commit https://github.com/blacksphere/blackmagic/commit/e010cd763def53df30b6013676899d2ead4ab794