Incorrect glyphs printed from OpenType PS font when printing on Windows

When printing on Windows, drawing any text containing characters that have unicode point greater than 0x80 with an OpenType PS font (ie. OpenType with Type 1 outlines) results in the incorrect glyphs being drawn.

This is closely related to QTBUG-11387 and QTBUG-10089. The underlying cause of all these problems is the use of the "ttf" flag in QFontEngineWin to determine whether a cmap table should be used, whereas in fact the cmap should also be used for OpenType PS fonts. The fix is to use the "cmap" flag in draw_text_item_win in QPrintEngine_win.cpp instead of the "ttf" flag, when determining whether to pass ETO_GLYPH_INDEX to the Win32 ExtTextOut API.

I've attached a test case to exhibit the bug. First install the supplied font Opus.otf from within the zip. Observe that the notehead drawn in the window becomes a '4' when printed. I've also attached a simple patch against 4.7 beta 2 that fixes this bug.