Switch GN defs on Mac and iOS to use frameworks, take 3

Change-Id: I5b06691d4f0383957b4031b3fd3e96bdfad94521
Cq-Include-Trybots: luci.skia.skia.primary:Canary-Flutter
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/309665
Commit-Queue: Jim Van Verth <jvanverth@google.com>
Reviewed-by: Mike Klein <mtklein@google.com>
2 files changed