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.

When advances are not printed, glyph offsets reflect absolute glyph
positions.

New API:
HB_BUFFER_SERIALIZE_FLAG_NO_ADVANCES
hb-shape --no-advances

Work in progress...

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

Always pass hb-shape as first argument to run-tests.py.

Also require automake 1.13.

In anticipation of importing more test suites.

Also makes hb-ot-shape call morx for now instead of GSUB... Just for testing.

Untested, but compiles.

Apparently we don't use OT_A either.

Numbers down (from 38):

KHMER: 299090 out of 299124 tests passed. 34 failed (0.0113665%)

New numbers (down from 39):

KHMER: 299086 out of 299124 tests passed. 38 failed (0.0127038%)