Do not send BackupFileReceived on every hunk, rather the last hunk of a file
Do not send BackupFileReceived on every hunk, rather the last hunk of a file

This hammered the device with BackupFileReceived messages and caused the
backup to fail in the middle of the backup process.

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