Also start of some solaris stuff.
Fixesgolang/go#10601 (all five ppc64le now in systemd)
Fixesgolang/go#14197 (all five arm64 up and also in systemd)
Updates golang/go#15072 (not a fix for Sun Solaris, but progress)
Updates golang/go#9515 (more progress towards SmartOS)
Change-Id: I9c878017904441823dae7b6945938396b0c2974b
Reviewed-on: https://go-review.googlesource.com/21670
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
Brad Fitzpatrick