[BUG] Launcher should check for eth0 before grepping

[maxxer]

Describe the bug
Newly flashed rpi0w always start in MANU mode due to 18a41f3

To Reproduce
Steps to reproduce the behavior:

1. flash a new sd
2. boot rpi0w with usb connected to power

Expected behavior
Start in AUTO mode

Environment (please complete the following information):

• Pwnagotchi version: 1.1.0
• Type of hardware: rpi0w

Additional context

Test should be:

 if [[ $(ifconfig | grep usb0 | grep RUNNING) ]] || [[ -f /sys/class/net/eth0/carrier && !$(grep '1' /sys/class/net/eth0/carrier) ]]; then

need to test it on pi3, then I'll make a PR