Also adds an update.sh script that does this automatically.

To be improved later.

This fixes the build on Cygwin.

https://gitlab.kitware.com/cmake/cmake/issues/17630

So we can stream lines to hb-shape and read output.

From old 'mort' table.

Add the note about absolute glyph positions from the commit message.

Hoping to reduce rounding error, to make tests happier...
No luck.

Hoping this would fix remaining text-rendering-tests failures,
but so far no luck.

Making cmake happy this time.

Ouch, make!

New API:
HB_BUFFER_FLAG_REMOVE_DEFAULT_IGNORABLES
hb-shape / hb-view --remove-default-ignorables

One more text-rendering-tests test passing.  Eleven failing.

Six more passing. Twelve failing now.

https://github.com/unicode-org/text-rendering-tests

Such a headache that Windows defines UINT8, ...; Just prefix it.

c:\projects\harfbuzz\src\hb-aat-layout-common-private.hh(51): error C2872: 'UINT16': ambiguous symbol [C:\projects\harfbuzz\build\harfbuzz.vcxproj]
C:\Program Files (x86)\Windows Kits\10\Include\10.0.14393.0\shared\basetsd.h(80): note: could be 'unsigned short UINT16'
c:\projects\harfbuzz\src\hb-open-type-private.hh(648): note: or       'OT::UINT16'

So I can merge this to master...

For not displaying extra data: no clusters, no advance. Just data pertaining
to where glyphs end up on the screen.