net: disable failing interface tests on dragonfly

(Issue #10041.)

Change-Id: Ia894ab60ac6b09926c684f99aacca79275cbced4
Reviewed-on: https://go-review.googlesource.com/6365Reviewed-by: Russ Cox <rsc@golang.org>

src/net/interface_test.go

@@ -48,6 +48,9 @@ func ipv6LinkLocalUnicastAddr(ifi *Interface) string {
 }
 
 func TestInterfaces(t *testing.T) {
+	if runtime.GOOS == "dragonfly" {
+		t.Skip("fail on dragonfly - issue 10041")
+	}
 	ift, err := Interfaces()
 	if err != nil {
 		t.Fatal(err)
@@ -105,6 +108,9 @@ func TestInterfaces(t *testing.T) {
 }
 
 func TestInterfaceAddrs(t *testing.T) {
+	if runtime.GOOS == "dragonfly" {
+		t.Skip("fail on dragonfly - issue 10041")
+	}
 	ift, err := Interfaces()
 	if err != nil {
 		t.Fatal(err)