line 323: Warning: info hides hb_buffer_t::info
...

Don't know why this is not caught by my compiler.  Looks like clang catches it
while gcc doesn't.

In file included from ../src/hb-aat-layout-morx-table.hh:31:
../src/hb-aat-layout-common-private.hh:523:30: error: no member named 'static_size' in 'AAT::ContextualSubtable<AAT::MorxTypes>::EntryData'
  DEFINE_SIZE_STATIC (4 + T::static_size);
                            ~~~^

Fixes MORX-11 test.

Tested with Zapfino and text "2nd". Sascha will create tests later.

Passes MORX-10 test now.

Neato.

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.