fix compiling error for goctl on windows

core/proc/shutdown+polyfill.go

@@ -4,8 +4,8 @@ package proc
 
 import "time"
 
-
-type ShutdownConf {}
+// ShutdownConf is empty on windows.
+type ShutdownConf struct {}
 
 // AddShutdownListener returns fn itself on windows, lets callers call fn on their own.
 func AddShutdownListener(fn func()) func() {
@@ -25,6 +25,10 @@ func SetTimeToForceQuit(duration time.Duration) {
 func Setup() {
 }
 
+// Setup does nothing on windows.
+func Setup() {
+}
+
 // Shutdown does nothing on windows.
 func Shutdown() {
 }