Rather than use the latest release, use the latest AppVeyor build
artifact (see
https://github.com/microsoft/DirectXShaderCompiler#downloads)
Latest release doesn't support tint's generated HLSL.
Bug: tint:872
Change-Id: Icfe5cc20647775cfae032407ae3e298c5519fbe1
Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/53602
Reviewed-by: Ben Clayton <bclayton@google.com>
Kokoro: Kokoro <noreply+kokoro@google.com>
Commit-Queue: Antonio Maiorano <amaiorano@google.com>