DEPS: update Harfbuzz to 2.1.1

Change-Id: Ib6f55461a533ebb6dcf4857febd7f008d68bcfc8
Reviewed-on: https://skia-review.googlesource.com/c/171232
Commit-Queue: Ben Wagner <bungeman@google.com>
Reviewed-by: Ben Wagner <bungeman@google.com>
Auto-Submit: Hal Canary <halcanary@google.com>
8 files changed