Fixed #8673: fixed a missing import in `django.core.files.move`.

git-svn-id: http://code.djangoproject.com/svn/django/trunk@8720 bcc190cf-cafb-0310-a4f2-bffc1f526a37

django/core/files/move.py

@@ -11,6 +11,7 @@ from django.core.files import locks
 try:
     from shutil import copystat
 except ImportError:
+    import stat
     def copystat(src, dst):
         """Copy all stat info (mode bits, atime and mtime) from src to dst"""
         st = os.stat(src)