Add a hack/stub for sceCccUTF8toSJIS(), some other stubs

These are from reporting, just so we get when they're called rather than linked.

Reorganized and added args to the sceCcc funcs.  For now did a memcpy for sceCccUTF8toSJIS(), since that's better than complete garbage.

Encoding/decoding the Unicode types here shouldn't be hard at all, but Shift-JIS is annoying unless I'm missing something.  We'll have to figure out the supplied table, use our own, or pull in some library, I think.

-[Unknown]