`S1`: Fix libedgetpu not found

[adamkewley]

Related?:

• https://github.com/google-coral/edgetpu/issues/611
• https://coral.ai/docs/m2/get-started/#2a-on-linux

[adamkewley]

sudo python3 examples/classify_image.py
adding root to apex and plugdev groups.
sudo adduser root apex
sudo usermod -aG plugdev root

[adamkewley]

May require running with sudo?

• https://github.com/tensorflow/tensorflow/issues/32743

[adamkewley]

More details for Pi installation defects:

https://github.com/tensorflow/tensorflow/issues/32743#issuecomment-570811813

[adamkewley]

And people are mentioning that you must ensure USB3 is enabled in the OS etc (we do this, but can double-check):

https://github.com/tensorflow/tensorflow/issues/32743#issuecomment-580657877

[adamkewley]

I need to speak with the group on Tuesday about this issue. Given that their Pi is otherwise fine, the software matches all other Pis (it wasn't re-flashed or anything), it is looking likely that it's a hardware issue of some sort that is manifesting as a "failure to load library" (because the library's loading procedure seems to involve hardware connections etc.).