only build non-prod skottie/sksg code in our tree

This this is enough to get Fuchsia going?

Change-Id: Id6577ee6b4e3c2cbae5ec8c42f3e004712ea477c
Reviewed-on: https://skia-review.googlesource.com/c/163442
Reviewed-by: Sanjay Chouksey <sanjayc@google.com>
Reviewed-by: Florin Malita <fmalita@chromium.org>
Commit-Queue: Mike Klein <mtklein@google.com>
2 files changed