harfbuzz: Update to version 4.2.0

harfbuzz: Update to version 4.2.0

- Update from 3.4.0 to 4.2.0
- Update of rootfile
- Changelog
   Overview of changes leading to 4.2.0
     Wednesday, March 30, 2022
	- Source code reorganization, splitting large hb-ot-layout files into smaller,
	  per-subtable ones under OT/Layout/*. Code for more tables will follow suit in
	  later releases. (Garret Rieger, Behdad Esfahbod)
	- Revert Indic shaper change in previous release that broke some fonts and
	  instead make per-syllable restriction of “GSUB” application limited to
	  script-specific Indic features, while applying them and discretionary
	  features in one go. (Behdad Esfahbod)
	- Fix decoding of private in gvar table. (Behdad Esfahbod)
	- Fix handling of contextual lookups that delete too many glyphs. (Behdad Esfahbod)
	- Make “morx” deleted glyphs don’t block “GPOS” application. (Behdad Esfahbod)
	- Various build fixes. (Chun-wei Fan, Khaled Hosny)
	- New API
	   +hb_set_next_many() (Andrew John)
   Overview of changes leading to 4.1.0
     Wednesday, March 23, 2022
	- Various OSS-Fuzz fixes. (Behdad Esfahbod)
	- Make fallback vertical-origin match FreeType’s. (Behdad Esfahbod)
	- Treat visible viramas like dependent vowels in USE shaper. (David Corbett)
	- Apply presentation forms features and discretionary features in one go in
	  Indic shaper, which seems to match Uniscribe and CoreText behaviour.
	  (Behdad Esfahbod, David Corbett)
	- Various bug fixes.
	- New API
	   +hb_set_add_sorted_array() (Andrew John)
   Overview of changes leading to 4.0.1
     Friday, March 11, 2022
	- Update OpenType to AAT mappings for “hist” and “vrtr” features.
	  (Florian Pircher)
	- Update IANA Language Subtag Registry to 2022-03-02. (David Corbett)
	- Update USE shaper to allow any non-numeric tail in a symbol cluster, and
	  remove obsolete data overrides. (David Corbett)
	- Fix handling of baseline variations to return correctly scaled values.
	  (Matthias Clasen)
	- A new experimental hb_subset_repack_or_fail() to repack an array of objects,
	  eliminating offset overflows. The API is not available unless HarfBuzz is
	  built with experimental APIs enabled. (Qunxin Liu)
	- New experimental API
	   +hb_link_t
	   +hb_object_t
	   +hb_subset_repack_or_fail()
   Overview of changes leading to 4.0.0
     Tuesday, March 1, 2022
	- New public API to create subset plan and gather information on things like
	  glyph mappings in the final subset. The plan can then be passed on to perform
	  the subsetting operation. (Garret Rieger)
	- Draw API for extracting glyph shapes have been extended and finalized and is
	  no longer an experimental API. The draw API supports glyf, CFF and CFF2
	  glyph outlines tables, and applies variation settings set on the font as well
	  as synthetic slant. The new public API is not backward compatible with the
	  previous, non-public, experimental API. (Behdad Esfahbod)
	- The hb-view tool will use HarfBuzz draw API to render the glyphs instead of
	  cairo-ft when compiled with Cairo 1.17.5 or newer, setting HB_DRAW
	  environment variable to 1 or 0 will force using or not use the draw API,
	  respectively. (Behdad Esfahbod)
	- The hb-shape and hb-view tools now default to using HarfBuzz’s own font
	  loading functions (ot) instead of FreeType ones (ft). They also have a new
	  option, --font-slant, to apply synthetic slant to the font. (Behdad Esfahbod)
	- HarfBuzz now supports more than 65535 (the OpenType limit) glyph shapes and
	  metrics. See https://github.com/be-fonts/boring-expansion-spec/issues/6 and
	  https://github.com/be-fonts/boring-expansion-spec/issues/7 for details.
	  (Behdad Esfahbod)
	- New API to get the dominant horizontal baseline tag for a given script.
	  (Behdad Esfahbod)
	- New API to get the baseline positions from the font, and synthesize missing
	  ones. As well as new API to get font metrics and synthesize missing ones.
	  (Matthias Clasen)
	- Improvements to finding dependencies on Windows when building with Visual
	  Studio. (Chun-wei Fan)
	- New buffer flag, HB_BUFFER_FLAG_PRODUCE_UNSAFE_TO_CONCAT, that must be set
	  during shaping for HB_GLYPH_FLAG_UNSAFE_TO_CONCAT flag to be reliably
	  produced. This is to limit the performance hit of producing this flag to when
	  it is actually needed. (Behdad Esfahbod)
	- Documentation improvements. (Matthias Clasen)
	- New API
	 - General:
	   +HB_BUFFER_FLAG_PRODUCE_UNSAFE_TO_CONCAT
	   +hb_var_num_t
	 - Draw:
	   +hb_draw_funcs_t
	   +hb_draw_funcs_create()
	   +hb_draw_funcs_reference()
	   +hb_draw_funcs_destroy()
	   +hb_draw_funcs_is_immutable()
	   +hb_draw_funcs_make_immutable()
	   +hb_draw_move_to_func_t
	   +hb_draw_funcs_set_move_to_func()
	   +hb_draw_line_to_func_t
	   +hb_draw_funcs_set_line_to_func()
	   +hb_draw_quadratic_to_func_t
	   +hb_draw_funcs_set_quadratic_to_func()
	   +hb_draw_cubic_to_func_t
	   +hb_draw_funcs_set_cubic_to_func()
	   +hb_draw_close_path_func_t
	   +hb_draw_funcs_set_close_path_func()
	   +hb_draw_state_t
	   +HB_DRAW_STATE_DEFAULT
	   +hb_draw_move_to()
	   +hb_draw_line_to()
	   +hb_draw_quadratic_to()
	   +hb_draw_cubic_to()
	   +hb_draw_close_path()
	   +hb_font_get_glyph_shape_func_t
	   +hb_font_funcs_set_glyph_shape_func()
	   +hb_font_get_glyph_shape()
	 - OpenType layout
	   +HB_OT_LAYOUT_BASELINE_TAG_IDEO_FACE_CENTRAL
	   +HB_OT_LAYOUT_BASELINE_TAG_IDEO_EMBOX_CENTRAL
	   +hb_ot_layout_get_horizontal_baseline_tag_for_script()
	   +hb_ot_layout_get_baseline_with_fallback()
	 - Metrics:
	   +hb_ot_metrics_get_position_with_fallback()
	 - Subset:
	   +hb_subset_plan_t
	   +hb_subset_plan_create_or_fail()
	   +hb_subset_plan_reference()
	   +hb_subset_plan_destroy()
	   +hb_subset_plan_set_user_data()
	   +hb_subset_plan_get_user_data()
	   +hb_subset_plan_execute_or_fail()
	   +hb_subset_plan_unicode_to_old_glyph_mapping()
	   +hb_subset_plan_new_to_old_glyph_mapping()
	   +hb_subset_plan_old_to_new_glyph_mapping()

Signed-off-by: Adolf Belka <adolf.belka@ipfire.org>