Don't write logs to the server's working directory when DEPLOYED.

Otherwise these logs will end up all getting split up when we switch
to the new deployment model.

(imported from commit 0514c296470be7113cab6c2f48e8dd33f1b9353d)

zephyr/lib/stats.py

@@ -1,15 +1,14 @@
+from django.conf import settings
 import os
 import logging
 
-STATS_DIR = os.path.join(os.path.dirname(__file__), "..", "..", "stats")
-
 def update_stat(name, value):
     try:
-        os.mkdir(STATS_DIR)
+        os.mkdir(settings.STATS_DIR)
     except OSError:
         pass
 
-    base_filename = os.path.join(STATS_DIR, name)
+    base_filename = os.path.join(settings.STATS_DIR, name)
     tmp_filename = base_filename + ".new"
 
     try: