078: work on font.getGlyphOrder() instead
078: work on font.getGlyphOrder() instead

Gets the names from post or CFF tables, so it works for TTFs and OTFs.

graphicore/fontbakery,moyogo/fontbakery,graphicore/fontbakery,googlefonts/fontbakery,moyogo/fontbakery,googlefonts/fontbakery,moyogo/fontbakery,graphicore/fontbakery,googlefonts/fontbakery