Roll HarfBuzz from 09a26623 to 49c52fa9 (777 commits)

https://chromium.googlesource.com/external/github.com/harfbuzz/harfbuzz.git/+log/09a266236147497bd8149240062c31c16fbc81e3..49c52fa95316042390bc07bc9fe9438b63cd3320

Change-Id: I8c868ccaa198aa4fc719031521d221f674288fba
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/716760
Reviewed-by: Kevin Lubick <kjlubick@google.com>
Commit-Queue: Ben Wagner <bungeman@google.com>
4 files changed