[L] Change in osmo-trx[master]: device/websdr: add WebSDR transceiver backend and build target

Attention is currently required from: pespin.

Timur Davydov has posted comments on this change by Timur Davydov. ( https://gerrit.osmocom.org/c/osmo-trx/+/42411?usp=email )

Change subject: device/websdr: add WebSDR transceiver backend and build target ......................................................................

Patch Set 4:

(1 comment)

File Transceiver52M/device/websdr/TransceiverWebSdr.cpp:

https://gerrit.osmocom.org/c/osmo-trx/+/42411/comment/dc3abae4_430d8b5a?usp=... : PS3, Line 50: : Transceiver(cfg, wTransmitLatency, wRadioInterface)

Thanks for the feedback. […]

I've moved the implementation into `Transceiver52` instead of placing it under `device/`.