Generate SkRP golden outputs from test files.

This should make it easier to see the impact of changes to the
code generator.

Change-Id: Iadaef3cc4766ec12d74c0030a348af7de9ca1bf0
Bug: skia:13676
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/630616
Reviewed-by: Chris Mumford <cmumford@google.com>
Commit-Queue: John Stiles <johnstiles@google.com>
Auto-Submit: John Stiles <johnstiles@google.com>
301 files changed