Add renderTasks to the DAG before calling addDependency

This makes sure the dependent task is already in the DAG before a
textureResolveRenderTask calls "addBeforeLast".

Bug: skia:
Change-Id: Ib276d41c386fd3d5a237212d60d7bf67a662e419
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/237257
Reviewed-by: Greg Daniel <egdaniel@google.com>
Commit-Queue: Chris Dalton <csmartdalton@google.com>
4 files changed