Correct TTF names for bold faces

Correct TTF names for bold faces

Unlike other weights, "Bold" can be represented in the normal TTF
Family/Subfamily structure, so it should be put there.  To avoid making
the single printf call for LangName unbearably complex, I've split it
into two, one for the case where the typographic family/subfamily names
(16/17) differ from the basic ones, and one for when they don't.