runtime/internal/atomic: add s390x operators for And/Or
These primitives will be used by the new And/Or sync/atomic apis.
For #61395
Change-Id: Ia9b4877048002d3d7d1dffa2311d0ec5f38e4ee5
GitHub-Last-Rev:
20dea110c824913c0c3d9c259e3e21e7ff8e4ba9
GitHub-Pull-Request: golang/go#63318
Reviewed-on: https://go-review.googlesource.com/c/go/+/531678
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Keith Randall <khr@google.com>
Reviewed-by: Michael Knyszek <mknyszek@google.com>
Reviewed-by: Keith Randall <khr@golang.org>
Run-TryBot: Mauri de Souza Meneguzzo <mauri870@gmail.com>
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