Roll third_party/externals/swiftshader 663dcefa22ea..d6e903bdc9ef (4 commits)

https://swiftshader.googlesource.com/SwiftShader.git/+log/663dcefa22ea..d6e903bdc9ef

git log 663dcefa22ea..d6e903bdc9ef --date=short --first-parent --format='%ad %ae %s'
2019-11-28 sugoi@google.com Support multisampled Bresenham lines
2019-11-27 sugoi@google.com Support sample image instruction operand
2019-11-27 jmadill@chromium.org Fix ICD build when using multiple toolchains.
2019-11-27 chrisforbes@google.com gles: Only clamp default block uniform indexes

Created with:
  gclient setdep -r third_party/externals/swiftshader@d6e903bdc9ef

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/skia.primary:Test-Debian9-Clang-GCE-GPU-SwiftShader-x86_64-Debug-All-SwiftShader
Bug: None
Tbr: bungeman@google.com
Change-Id: Idd580f75633af0eb34fd9693f82c0e98c5cd1694
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/257156
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