Running from outside of jq_flasher directory fails.

Works fine if running from the project directory.
Attempting to launch from anywhere else (eg: current project)

```system
python3 ~/jqflasher/main.py --chipname bl702 --port /dev/ttyUSB0 --firmware myfirmware.bin
```

 results in
```
FileNotFoundError: [Errno 2] No such file or directory: 'chips/bl702/image/eflash_loader/eflash_loader_32m.bin'
```