FlipTDI reboots Flipper after connection to Linux PC

[AbortRetryFail]

Flipper crashed with "furi_check failed" after running FlipTDI.

Flipper Zero Firmware 1.0.1, FlipTDI 1.0

I'm not even sure FlipTDI's UART function works at all. Checking all the pins with an oscilloscope while running cat /dev/urandom > /dev/ttyUSB0 reveals nothing but a few pins high. The built-in GPIO USB-UART bridge function works as expected.

[AbortRetryFail]

Repro steps, since I forgot them:

1. Connect Flipper to Linux PC
2. Start FlipTDI
3. Exit FlipTDI
   ... crash.

[skotopes]

happens when FlipTDI start with usb active(companion app running). We'll fix it in next update.

[portasynthinca3]

Fixed in #259