8246104: Some complex text doesn't render correctly on macOS

[johanvos]

[Mac only] register system fonts. Fix for JDK-8246104

The list of available fonts returned by CTFontCollectionCreateFromAvailableFonts does not contain internal fonts (at least not by default, although this is not documented). By registering font(s) (files), those fonts become available in the returned list. The CT Glyph processing might assign internal fonts to a glyph, and since we lookup the requested font in this list, we fail if the list doesn't contain the font. This PR registers all fonts in the system library so that they become available. This is not creating additional Java objects or overhead, as it almost directly invokes CTFontManagerRegisterFontsForURL via CTFontFile.registerFont(String fontfile)

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Progress

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Issue

• JDK-8246104: Some complex text doesn't render correctly on macOS

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[kevinrushforth]

I am closing this PR now that #1067 is integrated.