some example gdbinit files are missing -T 4 option

[ClemensElflein]

The gdbinit-bmp file here is missing the -T 4 option: https://github.com/orbcode/orbmule/blob/main/examples/simple/gdbinit_files/gdbinit-bmp. I think it also applies to the other files in the directory.

The one in the parent directory is correct: https://github.com/orbcode/orbmule/blob/main/examples/simple/.gdbinit-bmp

I think we should only have one file as a reference in order to avoid confusion. I'd personally go for the one inside the gdbinit_files, because it is more visible (non-hidden).