Roll third_party/externals/swiftshader 88632cac30e1..b2407dd746de (3 commits)

https://swiftshader.googlesource.com/SwiftShader.git/+log/88632cac30e1..b2407dd746de

git log 88632cac30e1..b2407dd746de --date=short --no-merges --format='%ad %ae %s'
2019-11-13 chrisforbes@google.com regres: Don't ignore abnormal exits
2019-11-13 swiftshader.regress@gmail.com Regres: Update test lists @ 88632cac
2019-11-13 digit@google.com [vulkan] Implement VK_KHR_external_memory_fd for Linux and Android.

Created with:
  gclient setdep -r third_party/externals/swiftshader@b2407dd746de

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 halcanary@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=halcanary@google.com
Change-Id: I3098d5e7f8dfc21bc0ac5211b0899f9114c600b1
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/254540
Reviewed-by: skia-autoroll <skia-autoroll@skia-public.iam.gserviceaccount.com>
Commit-Queue: skia-autoroll <skia-autoroll@skia-public.iam.gserviceaccount.com>
diff --git a/DEPS b/DEPS
index f8aa65e..2b56bb5 100644
--- a/DEPS
+++ b/DEPS
@@ -30,7 +30,7 @@
   "third_party/externals/spirv-cross"     : "https://chromium.googlesource.com/external/github.com/KhronosGroup/SPIRV-Cross@53ab2144b90abede33be5161aec5dfc94ddc3caf",
   "third_party/externals/spirv-headers"   : "https://skia.googlesource.com/external/github.com/KhronosGroup/SPIRV-Headers.git@29c11140baaf9f7fdaa39a583672c556bf1795a1",
   "third_party/externals/spirv-tools"     : "https://skia.googlesource.com/external/github.com/KhronosGroup/SPIRV-Tools.git@0c4feb643b89d1792b02f7cbef315e9d95633bd7",
-  "third_party/externals/swiftshader"     : "https://swiftshader.googlesource.com/SwiftShader@88632cac30e167d56deef8a84fb97491bc390636",
+  "third_party/externals/swiftshader"     : "https://swiftshader.googlesource.com/SwiftShader@b2407dd746decd2418167aa29f1af788cd902904",
   #"third_party/externals/v8"              : "https://chromium.googlesource.com/v8/v8.git@5f1ae66d5634e43563b2d25ea652dfb94c31a3b4",
   "third_party/externals/wuffs"           : "https://skia.googlesource.com/external/github.com/google/wuffs.git@4080840928c0b05a80cda0d14ac2e2615f679f1a",
   "third_party/externals/zlib"            : "https://chromium.googlesource.com/chromium/src/third_party/zlib@47af7c547f8551bd25424e56354a2ae1e9062859",