Debug symbols from libs not being linked on windows

[Hipreme via Digitalmars-d-learn]

I have separated my project in a bunch of modules to be compiled 
separated. But it seems I have lost my debugging power since 
then. I would like to know if there is any workaround beside not 
using it as a lib.

I'm using it from dub and it is has the debug options on them:
```
"buildOptions": [
                "debugMode",
                "debugInfo",
                "debugInfoC"
        ],
```
And on every lib too.