Updated to ham/uhd-3.9.3
------------------------
## 003.009.003
* UBX: Fixed a phase synchronization issue on the sub-1GHz band
* USB: Fixed transport issue that crashed when multiple USB devices were
  connected on a Windows machine, more graceful handling of USB disconnects,,
  provided .cdf file for installing on Windows
* B200: Fixed memory growth/increasing tune times issue
* E300: Fixed memory leak with udev, fixed issue with autoboot value, fixes
  to button behaviour
* usrp2, usrp3: Fixed IQ imbalance and DC bias in DDC chain
* CMake: Windows registry fixes
* Fixed several compiler warnings and minor bugs
* Examples: Updated benchmark_rate for improved thread safety

(mef)