[fpc-pascal] Free Pascal Directories

[Marco van de Voort]

In our previous episode, Brian said:
> 
> Is there any way to tell the compiler to just link existing .ppu and .o
> files ?

There are three things in such case:

- compile the immutable packages with -Ur
- find actually WHY the compiler doesn't want to use the .ppu's and get to
  the root of the problem. Use -va to prints LOTS of debugging info.
- make sure that the compiler can't find any source.