[coretext] Compare CGFont and PS name, if CTFont didn't match See comments. Fixes vertical text. CoreText backend is in very good shape now! Also see: 5a0eed3b50629be4826e4e9428f2c3255195395d 25f4fb9b56bb3f8bec821571c78f8829e40daa54 Fixes http://github.com/behdad/harfbuzz/pull/36