Make fuzzing use embedded test font

This will make fuzzing more hermetic and less machine-dependent.

Docs-Preview: https://skia.org/?cl=217864
Change-Id: If29d7b86e5290e9f749cb2fdde6f2ff892ffc333
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/217864
Commit-Queue: Kevin Lubick <kjlubick@google.com>
Reviewed-by: Mike Klein <mtklein@google.com>
2 files changed