netbsd/arm64 now complies with all the requirements for a port as
specified on https://golang.org/wiki/PortingPolicy
Note that this was preliminarily announced in the Go 1.13 release notes
(CL 183637) but then removed again due to the port lacking a builder at
that time (CL 192997).
Updates #30824
Change-Id: I2f40fabc84fe9cb699282e6a9d13ed9b64478e36
Reviewed-on: https://go-review.googlesource.com/c/go/+/259277
Trust: Tobias Klauser <tobias.klauser@gmail.com> Reviewed-by: Ian Lance Taylor <iant@golang.org>