fix: goctl compile error on windows (#4538)

core/proc/shutdown+polyfill.go

@@ -5,7 +5,7 @@ package proc
 import "time"
 
 // ShutdownConf is empty on windows.
-type ShutdownConf struct {}
+type ShutdownConf struct{}
 
 // AddShutdownListener returns fn itself on windows, lets callers call fn on their own.
 func AddShutdownListener(fn func()) func() {
@@ -22,7 +22,7 @@ func SetTimeToForceQuit(duration time.Duration) {
 }
 
 // Setup does nothing on windows.
-func Setup() {
+func Setup(conf ShutdownConf) {
 }
 
 // Shutdown does nothing on windows.