roll GN

Update fetch-gn to fetch gn CIPD packages.
The hashing seemed unimportant... we could add it back.

Change-Id: I56be8a62d11be20100be41e0889d2088baefbcf0
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/280707
Commit-Queue: Jim Van Verth <jvanverth@google.com>
Auto-Submit: Mike Klein <mtklein@google.com>
Reviewed-by: Jim Van Verth <jvanverth@google.com>
1 file changed