Add fontations gm to Bazel build of viewer

Change-Id: Idb9d48e49ec7c501002bc0cb05e70cdda0c51e3c
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/760896
Reviewed-by: Ben Wagner <bungeman@google.com>
Commit-Queue: Kevin Lubick <kjlubick@google.com>
4 files changed