Roll third_party/externals/swiftshader 4b9e06d6a2df..09a91e48c066 (1 commits)

https://swiftshader.googlesource.com/SwiftShader.git/+log/4b9e06d6a2df..09a91e48c066


git log 4b9e06d6a2df..09a91e48c066 --date=short --no-merges --format='%ad %ae %s'
2019-02-05 bclayton@google.com Silence clang warning spewed by every .cpp compile


Created with:
  gclient setdep -r third_party/externals/swiftshader@09a91e48c066

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=fmalita@google.com

Change-Id: Ic546e40a0d19db37b37609f223da62c5975d90a9
Reviewed-on: https://skia-review.googlesource.com/c/189556
Reviewed-by: skia-autoroll <skia-autoroll@skia-public.iam.gserviceaccount.com>
Commit-Queue: skia-autoroll <skia-autoroll@skia-public.iam.gserviceaccount.com>