add audio support, trying to manage MSD device

http/hw/hid/op.go

@@ -8,6 +8,7 @@ import (
 )
 
 func (h *Hid) OpenNoLock() {
+	log.Debug("OpenNoLock hid")
 	var err error
 	h.CloseNoLock()
 
@@ -39,6 +40,7 @@ func (h *Hid) Open() {
 }
 
 func (h *Hid) CloseNoLock() {
+	log.Debug("CloseNoLock")
 	for _, file := range []*os.File{h.g0, h.g1, h.g2} {
 		if file != nil {
 			_ = file.Sync()