Roll third_party/externals/swiftshader 2e2385837e9b..20aab4e9c149 (24 commits)

https://swiftshader.googlesource.com/SwiftShader.git/+log/2e2385837e9b..20aab4e9c149


git log 2e2385837e9b..20aab4e9c149 --date=short --no-merges --format='%ad %ae %s'
2019-05-02 chrisforbes@google.com Add support for sampling VK_FORMAT_B4G4R4A4_UNORM_PACK32
2019-05-02 chrisforbes@google.com Add support for sampling VK_FORMAT_A2B10G10R10_UNORM_PACK32
2019-05-02 hliatis@google.com Implement Android shared image query so device creation can succeed
2019-05-02 hliatis@google.com Add stubs for Native Buffer implementation
2019-05-02 hliatis@google.com Turn on Android platform
2019-05-01 chrisforbes@google.com Remove Sampler::State::srgb
2019-05-01 chrisforbes@google.com Add mandatory 10bpc formats to format queries
2019-05-01 chrisforbes@google.com Minor tidying in PixelProgram
2019-05-01 bclayton@google.com SpirvShader: Implement OpGroupNonUniformElect
2019-05-01 chrisforbes@google.com Fix killMask initialization
2019-05-01 bclayton@google.com SpirvShader: Don't abort for unused, unbound UniformConstants
2019-05-01 bclayton@google.com SpirvShader: Rework debug assertions
2019-05-01 bclayton@google.com Check macro arguments match format specifier.
2019-05-01 capn@google.com Implement Bias image operand
2019-05-01 chrisforbes@google.com Implement fp16 texture formats
2019-05-01 bclayton@google.com SpirvShader: Implement OpCopyMemory
2019-05-01 bclayton@google.com VkPipeline: Add spirvopt MergeReturnPass
2019-05-01 bclayton@google.com SpirvShader: Implement constant variable initializers.
2019-05-01 swiftshader.regress@gmail.com Regres: Update test lists @ 2e238583
2019-05-01 capn@google.com Update Visual Studio LLVM project
2019-05-01 capn@google.com Remove CHECK_NEEDED comments
2019-05-01 bclayton@google.com Minimize LLVM source file set
2019-05-01 bclayton@google.com Mark LLVM source files for potential deletion from build
2019-05-01 bclayton@google.com Add a script to reduce source files to required set


Created with:
  gclient setdep -r third_party/externals/swiftshader@20aab4e9c149

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=ethannicholas@google.com

Change-Id: I8b279ad9aa6b301a4d5da8849deef5b9ce959207
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/211695
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 5a4ce82..3b4af36 100644
--- a/DEPS
+++ b/DEPS
@@ -28,7 +28,7 @@
   "third_party/externals/sfntly"          : "https://chromium.googlesource.com/external/github.com/googlei18n/sfntly.git@b55ff303ea2f9e26702b514cf6a3196a2e3e2974",
   "third_party/externals/spirv-headers"   : "https://skia.googlesource.com/external/github.com/KhronosGroup/SPIRV-Headers.git@661ad91124e6af2272afd00f804d8aa276e17107",
   "third_party/externals/spirv-tools"     : "https://skia.googlesource.com/external/github.com/KhronosGroup/SPIRV-Tools.git@e9e4393b1c5aad7553c05782acefbe32b42644bd",
-  "third_party/externals/swiftshader"     : "https://swiftshader.googlesource.com/SwiftShader@2e2385837e9b46547d8fb944882f93ac9088c40b",
+  "third_party/externals/swiftshader"     : "https://swiftshader.googlesource.com/SwiftShader@20aab4e9c1498fb5950b64df49c7ea79539a9af8",
   #"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@f58ffbc927899b9534a273d3057094ce6ac1ed61",
   "third_party/externals/zlib"            : "https://chromium.googlesource.com/chromium/src/third_party/zlib@47af7c547f8551bd25424e56354a2ae1e9062859",