Build arm64 images on self hosted runner

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bors: arm64

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bors try amd64 --target s390x-unknown-linux-musl

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try

Build failed:

• conclusion

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bors try --target s390x-unknown-linux-musl

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try

Build failed:

• conclusion

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bors retry

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try

Build failed:

• conclusion

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bors retry

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try

Build failed:

• conclusion

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bors retry

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try

Build failed:

• conclusion

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bors retry

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try

Build failed:

• conclusion

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bors retry

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try

Build failed:

• conclusion

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bors retry

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try

Build failed:

• conclusion

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bors retry

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try

Build failed:

• conclusion

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bors retry

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bors r+

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Build failed:

• conclusion

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try

Build failed:

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bors try amd64

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try

Build succeeded:

• conclusion

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bors r+

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Build succeeded:

• conclusion