tree 1eca137dbdaa874a78641e77ad2563313a4e5788
parent 5e1f44e85110c37abe2eb2c38578656b20a24362
author Scott Todd <scotttodd@google.com> 1585610504 -0700
committer Copybara-Service <copybara-worker@google.com> 1585610939 -0700

Update third_party/swiftshader and our helper build script.

Tested briefly on Linux by running `iree/samples/vulkan/simple_mul.mlir` through `-iree-run-mlir`.

Closes https://github.com/google/iree/pull/1317

PiperOrigin-RevId: 303846156