Roll HarfBuzz to 1.8.8

https://chromium.googlesource.com/external/github.com/harfbuzz/harfbuzz/+log/b6fdcf4f8bd09e065c767939125861c9dc8ff18f..7112c6413ca7a1773847fe258145cc5162420953

Bug: 873568
Change-Id: Ia6a7c9baa0bdce0bc3d4dc50c75c70c0dbbb6555
Tbr: [email protected]
Reviewed-on: https://chromium-review.googlesource.com/1174951
Commit-Queue: Emil A Eklund <[email protected]>
Reviewed-by: Emil A Eklund <[email protected]>
Cr-Commit-Position: refs/heads/master@{#583331}
2 files changed