add DM::FontMgr to ok

The bots will still use DM, but the multiprocess architecture of ok
makes it easier to isolate and debug crashes, assertions, and unit
test failures.

Usage:
  $ ninja -C out ok
  $ out/ok test portable_fonts
...
935 ok, 4 failed, 5 crashed
...

Change-Id: I6bbd0ffc02d19bb5907c71eaebe30ac3646a80a6
Reviewed-on: https://skia-review.googlesource.com/68201
Reviewed-by: Mike Klein <mtklein@chromium.org>
Commit-Queue: Mike Klein <mtklein@chromium.org>
2 files changed