R4 Ubuntu Image

Hi @frank-w

According to the pipeline workflow of Images repo, what are the purposes of adding replacehostapd=1 and replaceiperf=1?

It replaces binaries (installing to different location to be used instead of the distribution version) for hostapd and iperf(3) with a most recent version because the versions shipped by ubuntu/debian were too old for wifi7 (missing SAE) and iperf had issues while rss/lro tests.

These binaries are built by my arm-crosscompile repo and downloaded by the image builder scripts.