enable podman-remote on windows

build a podman-remote binary for windows that allows users to use the
remote client on windows and interact with podman on linux system.

Signed-off-by: baude <bbaude@redhat.com>

utils/utils_supported.go

@@ -0,0 +1,39 @@
+// +build linux darwin
+
+package utils
+
+import (
+	systemdDbus "github.com/coreos/go-systemd/dbus"
+	"github.com/godbus/dbus"
+)
+
+// RunUnderSystemdScope adds the specified pid to a systemd scope
+func RunUnderSystemdScope(pid int, slice string, unitName string) error {
+	var properties []systemdDbus.Property
+	conn, err := systemdDbus.New()
+	if err != nil {
+		return err
+	}
+	properties = append(properties, systemdDbus.PropSlice(slice))
+	properties = append(properties, newProp("PIDs", []uint32{uint32(pid)}))
+	properties = append(properties, newProp("Delegate", true))
+	properties = append(properties, newProp("DefaultDependencies", false))
+	ch := make(chan string)
+	_, err = conn.StartTransientUnit(unitName, "replace", properties, ch)
+	if err != nil {
+		return err
+	}
+	defer conn.Close()
+
+	// Block until job is started
+	<-ch
+
+	return nil
+}
+
+func newProp(name string, units interface{}) systemdDbus.Property {
+	return systemdDbus.Property{
+		Name:  name,
+		Value: dbus.MakeVariant(units),
+	}
+}