Update FreeType to 2.8.1 + 107 CLs

Update FreeType to 94f6d57a (107 CLs past 2.8.1) to match FreeType
bundled with Chrome on other platforms.

A subset of what's new:
  - Faster bitmap emoji font loading
  - Better variable font support including bug fixes
  - New LCD rendering called Harmony (not yet enabled).

In addition, disable unused modules (bdf,pcf,pcr,winfonts,lzw)
to save about 52 KiB and reduce potential risks associated with them.

BUG=None
TEST=emerge-${BOARD} freetype
TEST=cros tryjob -g 758744 chromiumos-sdk amd64-generic-full daisy-full

Change-Id: I056ff78cca872330b0fc2b1d80d03603b36ca877
Reviewed-on: https://chromium-review.googlesource.com/758744
Commit-Ready: Jungshik Shin <jshin@chromium.org>
Tested-by: Jungshik Shin <jshin@chromium.org>
Reviewed-by: Mike Frysinger <vapier@chromium.org>
5 files changed