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.

Seems to be what Uniscribe does.

At this point I think it's work checking our default...

Fixes Bug 76767 - Zeroing of advance of 2nd component of multiple
substitution with SBL Hebrew
https://bugs.freedesktop.org/show_bug.cgi?id=76767

Micro-test added.

Looks like Unsicribe responds to the 'mymr' tag by zeroing marks
GDEF_LATE instead of generic-shaper UNICODE_LATE.  Implement that.

Fixes
Bug 81775 - Incorrect Rendering with harfbuzz-ng myanmar unicode
https://bugs.freedesktop.org/show_bug.cgi?id=81775

Micro-test added based on Padauk.

Patch from Maks Naumov.
Fixes https://github.com/behdad/harfbuzz/pull/22

If user doesn't check hb_feature_from_string() return value, we
don't want them to end up see the partially-parsed feature.

With this, I believe we accept CSS feature strings completely.

We now allow things like "dlig on" / "dlig=on".

It's defined in hb-private.h already.

Towards accepting CSS font-feature-settings strings.

Some systems insist on -Wmissing-field-initializers.  We have too many,
by design.  Fix a few easy ones.

See comment.

Micro-tests added.

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

Ouch!

https://github.com/behdad/harfbuzz/commit/db308280488c2ee11ba865a9922eb6a0c1abeef3#commitcomment-7077778

To make C language police happy.

Fixes https://github.com/behdad/harfbuzz/pull/38

Set requested windows header to Vista.  See discussion:

https://github.com/behdad/harfbuzz/commit/fbb2847f541389f40718af71c4945024ae177ab2#commitcomment-7054700

From
https://code.google.com/p/chromium/issues/detail?id=393896

Ouch!

Follows the order of the Arabic/Syriac specs.  Also don't stop
between rlig and calt in non-Arabic scripts.

Micro-tests for Arabic and Mongolian added for the latter.

This reverts bf029281 and fixes it properly.  That commit
was not enough as it was only inheriting the shaping_action
for prev_action, but not curr_action.

Micro-test added.

https://code.google.com/p/chromium/issues/detail?id=393896