Roll SwiftShader from 9eb5acaba94c to 6aad52e1aef6 (5 revisions)

Bug: skia:12385
Change-Id: Ib53ad5115e085ca03e22a2fc91e9235717e9e113
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/443436
Reviewed-by: Joe Gregorio <jcgregorio@google.com>
Commit-Queue: Kevin Lubick <kjlubick@google.com>
5 files changed