Fix a specific use case for the CQ.

gcl.py

Index: gcl.py
diff --git a/gcl.py b/gcl.py
index 01a93e11c719273847b9b956cc6a0e332243843e..fcfd114646406f662308798acb12d1ac676e405f 100755
--- a/gcl.py
+++ b/gcl.py
@@ -123,6 +123,9 @@ def GetCachedFile(filename, max_age=60*60*24*3, use_root=False):
   Note: The cache will be inconsistent if the same file is retrieved with both
         use_root=True and use_root=False. Don't be stupid.
   """
+  if not os.path.isdir(GetCacheDir()):
+    os.makedirs(GetCacheDir())
+
   if filename not in FILES_CACHE:
     # Don't try to look up twice.
     FILES_CACHE[filename] = None