[ft] Revert change-of-behavior of hb_ft_font_create() introduced in 1.0.5

The default FreeType load flags where changed from FT_LOAD_NO_HINTING
to FT_LOAD_DEFAULT in 2a9627c5.
This is crashing HarfBuzz-enabled FreeType as I suppose it causes
infinite recursion between HB and FT autohinter...

Revert the behavior change.

Fixes https://github.com/behdad/harfbuzz/issues/143

src/hb-ft.cc

@@ -84,7 +84,7 @@ _hb_ft_font_create (FT_Face ft_face, bool unref)
   ft_font->ft_face = ft_face;
   ft_font->unref = unref;
 
-  ft_font->load_flags = FT_LOAD_DEFAULT;
+  ft_font->load_flags = FT_LOAD_DEFAULT | FT_LOAD_NO_HINTING;
 
   return ft_font;
 }