Roll third_party/externals/swiftshader 21be09d8e699..4fd7fccd6db5 (4 commits)
Roll third_party/externals/swiftshader 21be09d8e699..4fd7fccd6db5 (4 commits)

https://swiftshader.googlesource.com/SwiftShader.git/+log/21be09d8e699..4fd7fccd6db5

git log 21be09d8e699..4fd7fccd6db5 --date=short --first-parent --format='%ad %ae %s'
2019-12-18 chrisforbes@google.com Regres: Roll deqp forward to latest 1.1.6
2019-12-18 sugoi@google.com Allow 32F texture to use linear filtering
2019-12-18 capn@google.com Remove sw::Vector, Point, and Matrix
2019-12-18 swiftshader.regress@gmail.com Regres: Update test lists @ 21be09d8

Created with:
  gclient setdep -r third_party/externals/swiftshader@4fd7fccd6db5

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 0e499112533c8544f0505ea0d08394fb5ad7d8fa@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: 0e499112533c8544f0505ea0d08394fb5ad7d8fa@google.com
Change-Id: I91ab8399a034c5f4dc26cef9432ee951ffb4955e
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/261038
Reviewed-by: skia-autoroll <e034c62197df5622a9c1bef8b3e012f87a0a9840@skia-public.iam.gserviceaccount.com>
Commit-Queue: skia-autoroll <e034c62197df5622a9c1bef8b3e012f87a0a9840@skia-public.iam.gserviceaccount.com>

aosp-mirror/platform_external_skia,google/skia,aosp-mirror/platform_external_skia,google/skia,google/skia,aosp-mirror/platform_external_skia,HalCanary/skia-hc,google/skia,aosp-mirror/platform_external_skia,google/skia,aosp-mirror/platform_external_skia,HalCanary/skia-hc,HalCanary/skia-hc,HalCanary/skia-hc,google/skia,aosp-mirror/platform_external_skia,HalCanary/skia-hc,HalCanary/skia-hc,google/skia,aosp-mirror/platform_external_skia,aosp-mirror/platform_external_skia,HalCanary/skia-hc,aosp-mirror/platform_external_skia,HalCanary/skia-hc,aosp-mirror/platform_external_skia,google/skia,google/skia,google/skia,HalCanary/skia-hc,HalCanary/skia-hc