This brings ot-fonts into almost-complete shape and mostly in par with
ft font.

See comments.

Fixes https://bugs.freedesktop.org/show_bug.cgi?id=64501

Fixes https://bugs.freedesktop.org/show_bug.cgi?id=91559

Useful for code-coverage generation of the ragel-generated files
as they will now contain the correct .hh filename in them.

Bug 1045139 - The Arabic text with "MS Sans Serif" font is rendered bad
https://bugzilla.mozilla.org/show_bug.cgi?id=1045139

This is only enabled on Windows platforms, and requires support from
Uniscribe to work.  But for clients that do hook up to Uniscribe, this
fixes shaping of Windows-1256-encoded bitmap fonts like "MS Sans Serif".

The code and table together have just less than a 1kb footprint when
enabled.

UNTESTED.  I might even have broken regular Arabic fallback shaping.

From:
https://github.com/Alexpux/MINGW-packages/blob/master/mingw-w64-harfbuzz/0001-give-cc-to-gir-scanner.all.patch

No functional change.

The OT shaper supersedes the fallback shaper in every case
and the latter become an extra weight for 99.9% of users.

Now default shaper is truly no-op.

Not exhaustively tested, but I think I got the intended logic
right.

The logic can perhaps be simplified.  Maybe we should disabled
normalization with this shaper.  Then again, for now focusing on
correctness.

I was under the impression that EXTRA_DISTs will happen regardless of
automake conditionals.  Apparently I was wrong.

They've been disabled for a while and no one cared.  We're past
the point to need them for testing, and if we ever need to
resurrect them again, well, they're in git graveyard somewhere.

Also enable bootstrapping without them.

Move it to new harfbuzz-gobject library.  Implement enums and
boxed types for object-types.  Still have to do boxed types for
value types.

Add deprecated alias for old name.

Makes documentation / introspection easier.

Initial setup of gtk-doc. Straight forward setup following the gtk-doc
instructions. Ignore some troublesome types in src/hb-gobject.h. To
build use "./autogen.sh --enable-gtk-doc" then "make". Docs are in
harfbuzz/docs/reference/html/index.html.