jailbreak workaround for stuck during checkra1n jailbreak

long thread here: https://github.com/checkra1n/BugTracker/issues/1169

personal instructions:

• start checkra1n cli process as sudo, with sudo checkra1n -vV -l somefile to get verbose output and logging to a file
• in checkra1n enable unsupported devices and safe mode
• start process
• wait for 'right before trigger' stuckness
• important: wait for ~2-5 minutes, checking dmesg or cat /dev/kmsg for output of watchdog having killed checkra1n process (gives you a larger timeframe for next step)
• when that has happened, unplug and replug the device -- waiting ever so slightly before replugging (still, sub 1 sec)

note: so far on my notebook this only worked with the right usb port