Add Windows MSVC arm64 builders

Bug: skia:8569
Change-Id: I0d2e54191f4ad0a2cc7c22f6740fe0f81ca359a8
Reviewed-on: https://skia-review.googlesource.com/c/177064
Reviewed-by: Mike Klein <mtklein@google.com>
Reviewed-by: Eric Boren <borenet@google.com>
Commit-Queue: Brian Osman <brianosman@google.com>
2 files changed