vendor: add j-keck/arping

vendor/github.com/j-keck/arping/arping_windows.go

@@ -0,0 +1,28 @@
+// windows currently not supported.
+// dummy implementation to prevent compilation errors under windows
+
+package arping
+
+import (
+	"errors"
+	"net"
+	"time"
+)
+
+var errWindowsNotSupported = errors.New("arping under windows not supported")
+
+func initialize(iface net.Interface) error {
+	return errWindowsNotSupported
+}
+
+func send(request arpDatagram) (time.Time, error) {
+	return time.Now(), errWindowsNotSupported
+}
+
+func receive() (arpDatagram, time.Time, error) {
+	return arpDatagram{}, time.Now(), errWindowsNotSupported
+}
+
+func deinitialize() error {
+	return errWindowsNotSupported
+}