Roll third_party/externals/swiftshader a2f5fd826031..823ca85404fb (1 commits)

https://swiftshader.googlesource.com/SwiftShader.git/+log/a2f5fd826031..823ca85404fb


git log a2f5fd826031..823ca85404fb --date=short --no-merges --format='%ad %ae %s'
2019-03-02 chrisforbes@google.com Allow all vkBeginCommandBuffer flags


Created with:
  gclient setdep -r third_party/externals/swiftshader@823ca85404fb

The AutoRoll server is located here: https://autoroll.skia.org/r/swiftshader-skia-autoroll

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

If the roll is causing failures, please contact the current sheriff, who should
be CC'd on the roll, and stop the roller if necessary.

CQ_INCLUDE_TRYBOTS=skia.primary:Test-Debian9-Clang-GCE-GPU-SwiftShader-x86_64-Debug-All-SwiftShader
TBR=scroggo@google.com

Change-Id: Ie6dfd6b8f614fd749a3bf9e5d4732898b31f532d
Reviewed-on: https://skia-review.googlesource.com/c/196785
Reviewed-by: skia-autoroll <skia-autoroll@skia-public.iam.gserviceaccount.com>
Commit-Queue: skia-autoroll <skia-autoroll@skia-public.iam.gserviceaccount.com>