[fpc-pascal] Chinese/Japanese codepages to UTF8

[Marco van de Voort]

In our previous episode, ik said:
> I'm using iconv (Marco made a unit for it if i remember correctly)
> that converts one charset to another.

It was actually meant to be a fundament of the unix implementation of
lconvencoding.

But iirc it didn't make 2.2.2 due to some confusion over merging, so it is
not active there yet.