Some randomness is used by gcc when generating symbol names, unique
values and for LTO.
Provide a constant value based on the object file name in order to avoid
object files changing build-to-build, making debugging/disassembly
easier.
- for testing the JSON file is linked to 3d-gussner/Arduino_boards/Prusa_Merge_v1.0.3 branch
- after testing it will point to prusa3d/Arduino_boards/master