[OE-core] [PATCH 4/4] harfbuzz: upgrade to v0.9.19

[Burton, Ross]

Hi Cristian,

I did a buildhistory-diff and noticed more than the expected churn.
See the upstream NEWS for some important changes:
http://cgit.freedesktop.org/harfbuzz/tree/NEWS

"""
Moreover, ICU support is now build into a separate library:
libharfbuzz-icu.so, and a new harfbuzz-icu.pc is shipped for it.
Distros can enable ICU now without every application on earth
getting linked to via libharfbuzz.so.

For distros I recommend that they make sure they are building --with-glib
--with-freetype --with-cairo, --with-icu, and optionally --with-graphite2;
And package harfbuzz and harfbuzz-icu separately.
"""

We should split out the ICU package, and re-evaluate
disable_graphite.patch/submit upstream if it is a genuine problem with
the build system.

Ross