FWIW: Successful build on older Chromebook

[joaquinhar]

Just wanted to let people know that it is possible to build SDR++ on a nearly-five year old Acer CB5-571 chromebook running Chrome OS version 91.0.4472 (this computer is about 8 months past its AUE).
I used the rpi_install.sh script that Alexandre has provided. I believe that the only change to the script was to change libvolk1-dev to libvolk2-dev

SDR++ started and worked the first time.