Roll third_party/externals/swiftshader 30d3c8afe19c..6b4b8141e11d (2 commits)

https://swiftshader.googlesource.com/SwiftShader.git/+log/30d3c8afe19c..6b4b8141e11d

git log 30d3c8afe19c..6b4b8141e11d --date=short --no-merges --format='%ad %ae %s'
2019-09-26 chrisforbes@google.com Implement VK_EXT_queue_family_foreign
2019-09-26 amaiorano@google.com Add swiftshader_optimized_debug_build gn arg

Created with:
  gclient setdep -r third_party/externals/swiftshader@6b4b8141e11d

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 bungeman@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.primary:Test-Debian9-Clang-GCE-GPU-SwiftShader-x86_64-Debug-All-SwiftShader
Bug: None
TBR=bungeman@google.com
Change-Id: I612824572f7b3d23a81640fe6e7e5bf39c046ef5
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/244778
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