framework: log_debug - use correct parameter
    
    Fixes:
    $ sudo sealert -l '*'
    Traceback (most recent call last):
      File "/usr/bin/sealert", line 543, in <module>
        log_debug("main() args=%s" % sys.argv)
      File "/usr/lib64/python2.7/site-packages/setroubleshoot/util.py", line 94, in log_debug
        syslog.syslog(syslog.LOG_DEBUG, msg)
    TypeError: [priority,] message string