idevicebackup2: suppress message when notification_proxy gets disconnected
idevicebackup2: suppress message when notification_proxy gets disconnected

libimobiledevice/libimobiledevice,libimobiledevice/libimobiledevice,upbit/libimobiledevice,libimobiledevice-win32/libimobiledevice,Tatsh/libimobiledevice,kalev/libimobiledevice,kalev/libimobiledevice,libimobiledevice-win32/libimobiledevice,Tatsh/libimobiledevice,kalev/libimobiledevice,Tatsh/libimobiledevice,patweb/libimobiledevice,upbit/libimobiledevice,Tatsh/libimobiledevice,upbit/libimobiledevice,libimobiledevice-win32/libimobiledevice,libimobiledevice-win32/libimobiledevice,patweb/libimobiledevice,patweb/libimobiledevice