Add a hack to not fail if the EV3 bootloader sends an echo of the request
instead of the expected response. There is a known compatibility issue
with the EV3 bootloader USB and, e.g. Windows with USB 3.0 ports. This
apparently causes a race condition where commands that don't take long
to process before sending a response will have the request echoed back
instead of receiving the actual response. If this happens, we can
ignore it and assume the command was successful. It just won't work, e.g.
for the version command since that has a payload in the response.
David Lechner
04697e9afa