[Libre-soc-dev] Makefile setup.py

[Cole Poirier]

Hi Luke,

Wondering if we can change the 'develop' command in the Makefile to
use --user so one doesn't need root to install.

```current
develop:
    python3 setup.py develop # yes, develop, not install
```

```proposed
develop:
    python3 setup.py develop --user # yes, develop, not install
                                              ^^^^^^
```

Cole