Various fixes

- Do not enable CPU device together with OpenCL/CUDA when device name is not
  specified.
- Adopt output log parser fr the changed path tracing message.
- Solve issue with using same short name of command line argument for single
  device specification.
- Reshuffle include statements so it's kind of possible to use bundle python.
  Still need to work this properly, but that's for later.

benchmark/foundation/util.py

@@ -1,4 +1,3 @@
-import dateutil
 import foundation
 from foundation import progress
 import os
@@ -134,6 +133,7 @@ def blenderCommitUnixTimestamp(commit_date, commit_time):
     """
     Convert commit build time and time to unix timestamp
     """
+    import dateutil
     date_time = commit_date + " " + commit_time
     return dateutil.parser.parse(date_time)