Reformat gn files

Change-Id: I60ccd1ef19d6a6dc033e20e7ac55c3182d76ea0e
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/255082
Commit-Queue: Robert Phillips <robertphillips@google.com>
Reviewed-by: Greg Daniel <egdaniel@google.com>
5 files changed