gn: try to fix flutter roll

Change-Id: I8503ee596b35a45b5b0269cd6af98569115212cb
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/239116
Reviewed-by: Hal Canary <halcanary@google.com>
Commit-Queue: Hal Canary <halcanary@google.com>
1 file changed