[fpc-pascal] Windows backslash

[Marco van de Voort]

In our previous episode, Bart said:
> > the wrong path. So either 'make' is lying or FPC alters the path.
> >
> > In either case it is more a FPC issue than a Lazarus issue. The bug
> > report should be moved to FPC.
> 
> The compiler does not seem to have problems with constructs like:
> 
> fpc c:\path\^-^\foo.pp @c:\path\^-^\^-^\foo.cfg at all (see bugreport
> for an example).

Maybe the ^-as-an-escape is a shell-only convention. The  compiler doesn't
work through the shell.   Make probably does.