rpi3: FW tweaks + sparse git clone function
- New (smaller clone size) FW repo
- New WiFi/BT FW repo (old one was missing brcmfmac43430-sdio.txt)
- Only grab the FW files we need via new sparse git clone function
P.S. I've not played with zsh before, so if there are better ways to do this, let me know.
P.P.S. After installing wpa_supplicant and uncommenting the appropriate entries in /etc/network/interfaces, WiFi now works fine on my Pi3.