samples: net: zperf: Fix UDP uploader

Try to construct a proper iperf client header to the payload
as the server expects that. It is not sure if this is proper
way to do the iperf header as there is no documentation about
iPerf protocol anyway (except the iPerf source code).

Signed-off-by: Jukka Rissanen <jukka.rissanen@linux.intel.com>
3 files changed