dashboard: add netbsd-arm64-bsiegert builder (reverse)
dashboard: add netbsd-arm64-bsiegert builder (reverse)

Update golang/go#34036

Change-Id: Ic92093e764fa163d97a2f125a4534581adf217da
Reviewed-on: https://go-review.googlesource.com/c/build/+/249137
Reviewed-by: Dmitri Shuralyov <d181b7fea0ec87c86ba5a890ab716db52498e3ba@golang.org>
Run-TryBot: Dmitri Shuralyov <d181b7fea0ec87c86ba5a890ab716db52498e3ba@golang.org>
TryBot-Result: Gobot Gobot <66cb808b70d30c07676d5e946fee83fd561249e5@golang.org>

golang/build,golang/build,golang/build,golang/build