Roll third_party/externals/swiftshader 3cfa8e28be80..e6f65d9265e7 (5 commits)

https://swiftshader.googlesource.com/SwiftShader.git/+log/3cfa8e28be80..e6f65d9265e7

git log 3cfa8e28be80..e6f65d9265e7 --date=short --first-parent --format='%ad %ae %s'
2020-04-09 [email protected] Rename GenericValue to Operand
2020-04-09 [email protected] CMake: Fix linux build with SWIFTSHADER_BUILD_PVR
2020-04-09 [email protected] Vulkan/Debug: Fix clang-10 warning
2020-04-09 [email protected] third_party/cppdap: Roll forward to 4dcca577
2020-04-09 [email protected] Clamp _SNORM formats to -1.0

Created with:
  gclient setdep -r third_party/externals/swiftshader@e6f65d9265e7

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 [email protected] 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-Debian10-Clang-GCE-GPU-SwiftShader-x86_64-Debug-All-SwiftShader
Bug: None
Tbr: [email protected]
Change-Id: I22e6572650d4fbc095a36f8e97fdbc2806e0c382
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/282755
Reviewed-by: skia-autoroll <[email protected]>
Commit-Queue: skia-autoroll <[email protected]>

Author: skia-autoroll

DEPS

@@ -37,7 +37,7 @@ deps = {
   "third_party/externals/spirv-cross"     : "https://chromium.googlesource.com/external/github.com/KhronosGroup/SPIRV-Cross@6637610b16aacfe43c77ad4060da62008a83cd12",
   "third_party/externals/spirv-headers"   : "https://skia.googlesource.com/external/github.com/KhronosGroup/SPIRV-Headers.git@f8bf11a0253a32375c32cad92c841237b96696c0",
   "third_party/externals/spirv-tools"     : "https://skia.googlesource.com/external/github.com/KhronosGroup/SPIRV-Tools.git@e95fbfb1f509ad7a7fdfb72ac35fe412d72fc4a4",
-  "third_party/externals/swiftshader"     : "https://swiftshader.googlesource.com/SwiftShader@3cfa8e28be802d45dc314e96db4064afcef88f4b",
+  "third_party/externals/swiftshader"     : "https://swiftshader.googlesource.com/SwiftShader@e6f65d9265e764034c1c078bd67db893cd565cac",
   #"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",