Don't copy d3dcompiler_47.dll when build target is Windows ARM64
Don't copy d3dcompiler_47.dll when build target is Windows ARM64

Windows ARM64 was first released at 10.0.16299 which contains d3dcompiler_47.dll under %systemroot%\system32, so no need to copy it from Windows SDK. For the same reason, it is also not included as part of redistribute package for Windows ARM64.

Bug: chromium:893460

Change-Id: I175ce831d800ec1f19c767fc172219f6b693fec3
Reviewed-on: https://chromium-review.googlesource.com/c/1357155
Commit-Queue: Jamie Madill <7e492b4f1c8458024932de3ba475cbf015424c30@chromium.org>
Reviewed-by: Jamie Madill <7e492b4f1c8458024932de3ba475cbf015424c30@chromium.org>

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