Cleanup ghostscript-gnu-commfont and related CJK font support meta ports.
- Set WITH_GHOSTSCRIPT_GNU forcibly.
- Use PostScript virtual fonts to handle CJK CID/TT-CID emulated fonts.
CIDFnmap still works but when a font is both in Resource/Font or
Resource/CIDFont and in CIDFnmap, the former entry will be used.
For the actual font mapping, see files in Resource/CIDFont/*.
So, note that you need to remove (or rename) the virtual font if you use
CIDFnmap for the moment. This is still a transitional measure and
more consistent font management thoughout the ports collection should
be added later.
This is just an internal structural change; default font mapping has
not been changed.
- Add Chinese font support to print/gsfonts (but no dependency added).