Revert "Switch GN defs on Mac and iOS to use frameworks instead of libs."

This reverts commit c61e35dbc6664fb71e93210385e64f9774e37ad6.

Reason for revert: Breaking builds

Original change's description:
> Switch GN defs on Mac and iOS to use frameworks instead of libs.
> 
> GN will be removing support for frameworks in the libs variable, so
> might as well get ahead of it.
> 
> Change-Id: I67b118457721975ac2408308438d71172be66592
> Reviewed-on: https://skia-review.googlesource.com/c/skia/+/300181
> Commit-Queue: Jim Van Verth <jvanverth@google.com>
> Reviewed-by: Mike Klein <mtklein@google.com>

TBR=mtklein@google.com,jvanverth@google.com

Change-Id: I7b81a92a67181e08ee57bcb184768794281cd37a
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/300228
Reviewed-by: Jim Van Verth <jvanverth@google.com>
2 files changed