Make tebako application package executable

[maxirmx]

After runtime/application split the application packages are data files
The goal is to make them executables that can start and optionally upload appropriate run-time.

To meet this objective we shall either bypass dwarfs issue or implement a fix.
The issue is (tentative) that dwarfs image can be loaded from bigger file only if the loading application knows the image size in advance
This may need further research.