chan_ooh323: fix h323_log full path name

* fix to use astlogdir option for h323_log file instead of hardcoded

ASTERISK-23754 #close

Reported by: Igor Goncharovsky
Patches:
	ooh323_logger_patch.diff



git-svn-id: http://svn.asterisk.org/svn/asterisk/branches/1.8@414152 f38db490-d61c-443f-a65b-d21fe96a405b