Add support for `armv7l`

[JMTK]

Running on a raspberry pi 4B:

Linux raspberrypi 5.10.103-v7+ #1529 SMP Tue Mar 8 12:21:37 GMT 2022 armv7l GNU/Linux

jake@raspberrypi:~ $ curl -qsL https://raw.githubusercontent.com/fluencelabs/cli/main/install.sh | bash
Initiating Fluence CLI installation process...
Error: Unsupported architecture - armv7l

Let me know if there's any other information I can provide!