Correct CRC binary OTA firmware file

[pvvx]

The atc1441 TelinkFlasher will not work with the CGG1-M (and many others). The data is not signed correctly and when connecting it expects a UUID that CGG1-M does not have.
The correct signature for the binary OTA firmware file is put by the utility from the Telink SDK, and not from the Ai-Thinker-Open Telink_825X_SDK (!): https://github.com/pvvx/ATC_MiThermometer/tree/master/utils
All original OTA files (Xiaomi LYWSD03MMC, MHO-C401, CGG1-M, ...) are signed with this particular utility.
There is no such thing for Linux.
The size of the binary file must be correctly specified in the bootloader header (and have 0xXXXX4).

pvvx#41 (comment)