align GOOS=tamago support to go1.24.0

Author: abarisani

src/cmd/go/internal/mmap/testdata_tamago_test.go

@@ -0,0 +1,15 @@
+// Copyright 2025 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+//go:build tamago
+package mmap
+
+import (
+	"embed"
+	"os"
+)
+
+//go:embed testdata/*
+var testdata embed.FS
+func init() { os.CopyFS(".", testdata) }

src/context/example_test.go

@@ -205,7 +205,7 @@ func ExampleAfterFunc_connection() {
 		return n, err
 	}
 
-	listener, err := net.Listen("tcp", "localhost:0")
+	listener, err := net.Listen("tcp", "127.0.0.1:0")
 	if err != nil {
 		fmt.Println(err)
 		return