Revert "roll GN"

This reverts commit 81ec426d6eeaf3d7cb22a4b62afffe28efb0c5d7.

Reason for revert: breaks Xcode

Change-Id: Ib4dec91ae19e6b0ce242fa543cf7bcdf306c0220
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/297022
Reviewed-by: John Stiles <johnstiles@google.com>
Commit-Queue: John Stiles <johnstiles@google.com>
1 file changed