Try uploading the bootloader by converting an ST-Link into a Black Magic Probe

Via [this link](https://microcontrollerelectronics.com/how-to-convert-an-stm32f103c8t6-into-a-black-magic-probe/)

As [suggested by Ubi](https://www.youtube.com/watch?v=h2nKROPlFy0&lc=Ugz_kLs8s2h8RKxxlqh4AaABAg.9BkZmUeflnr9Bka7kc6Eeu)

![image](https://user-images.githubusercontent.com/413879/92109999-9258a780-ee1c-11ea-9858-33c3304695c3.png)
