Add optional static outputs to `go_binary`. (#617)
Add optional static outputs to `go_binary`. (#617)

Static binaries are built in the `static` output group, which can be
built using a `--output_groups=static` flag or by setting
`output_group="static"` in a dependent filegroup target.
bazelbuild/rules_go,bazelbuild/rules_go,Xjs/rules_go,Xjs/rules_go,bazelbuild/rules_go,bazelbuild/rules_go,bazelbuild/rules_go,Xjs/rules_go,Xjs/rules_go,Xjs/rules_go