Logging excepthook: print exception info if debug=True

Exception info is only printed by this function if verbose=True.
Since debug is considered a log level with more information than
verbose (INFO), exception info should also be printed when only
debug=True.

Change-Id: I349dc76320911600accc2acdb02d9d94710cfc85
Merge "Logging excepthook: print exception info if debug=True"