add agent log

src/modules/agent/report/report.go

 package report
 
 import (
+	"encoding/json"
 	"fmt"
 	"math/rand"
 	"os"
@@ -127,6 +128,8 @@ func report() error {
 		var body errRes
 		err := httplib.Post(url).JSONBodyQuiet(form).Header("X-Srv-Token", config.Config.Report.Token).SetTimeout(time.Second * 5).ToJSON(&body)
 		if err != nil {
+			js, _ := json.Marshal(form)
+			logger.Errorf("report payload: %s, token: %s", string(js), config.Config.Report.Token)
 			return fmt.Errorf("curl %s fail: %v", url, err)
 		}