OpenType/CFF Collection (OTC) fonts

[Masamichi Hosoda]

If I understand correctly,
current LilyPond cannot handle OpenType/CFF Collection (OTC) fonts
(NotoSansCJK.ttc and SourceHanSans.ttc etc.).
LilyPond processes them as TrueType Collection (TTC) fonts,
and outputs wrong PostScript file.

I thought it was a Ghostscript's issue.
http://lists.gnu.org/archive/html/bug-lilypond/2016-05/msg00046.html

However, in my investigation, it is a LilyPond's issue.

I've created Issue 4866 for OTC fonts support
and Issue 4867 for a workaround that ignores some major OTC fonts
for avoiding errors.
https://sourceforge.net/p/testlilyissues/issues/4866/
https://sourceforge.net/p/testlilyissues/issues/4867/