Roll third_party/externals/swiftshader b4a27407e2be..ba0c95eb406f (5 commits)

https://swiftshader.googlesource.com/SwiftShader.git/+log/b4a27407e2be..ba0c95eb406f

git log b4a27407e2be..ba0c95eb406f --date=short --first-parent --format='%ad %ae %s'
2020-04-07 bclayton@google.com Regres: Fix uncovered calculations after optimizations
2020-04-07 bclayton@google.com Regres: Optimize coverage processing
2020-04-07 bclayton@google.com Regres: Re-populate treeFile.allSpans on parse.
2020-04-07 bclayton@google.com Update third_party/marl/BUILD.gn with new files
2020-04-07 bclayton@google.com Update Marl to 539094011

Created with:
  gclient setdep -r third_party/externals/swiftshader@ba0c95eb406f

If this roll has caused a breakage, revert this CL and stop the roller
using the controls here:
https://autoroll.skia.org/r/swiftshader-skia-autoroll
Please CC csmartdalton@google.com on the revert to ensure that a human
is aware of the problem.

To report a problem with the AutoRoller itself, please file a bug:
https://bugs.chromium.org/p/skia/issues/entry?template=Autoroller+Bug

Documentation for the AutoRoller is here:
https://skia.googlesource.com/buildbot/+/master/autoroll/README.md

Cq-Include-Trybots: skia/skia.primary:Test-Debian10-Clang-GCE-GPU-SwiftShader-x86_64-Debug-All-SwiftShader
Bug: None
Tbr: csmartdalton@google.com
Change-Id: Ie36d699c03b21660900c699aadc58b84562c07a9
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/282227
Reviewed-by: skia-autoroll <skia-autoroll@skia-public.iam.gserviceaccount.com>
Commit-Queue: skia-autoroll <skia-autoroll@skia-public.iam.gserviceaccount.com>
1 file changed