[Lazarus] A simple way to stop the never ending story of long executable?

[Giuliano Colla]

I had tried in remote times to activate the "use external gdb debug 
symbols file" option, and it didn't work properly, so I forgot about it. 
But some time ago I tried again, and now it turns out to work perfectly, 
at least under Linux.

Wouldn't it be nice to set it active by default?

This could make unnecessary in many cases a different build mode for 
testing and for deploying, and would stop the complaints about "long 
executable".

Giuliano