8154921: Fix aix after "8146879: Add option for handling existing log files in UL" Summary: Rename os::fileno to os::get_fileno because AIX defines macro 'fileno'. Reviewed-by: coleenp

^build/
^dist/
nbproject/private/
^webrev
^.hgtip
^.bridge2
^.jib/
.DS_Store
.metadata/
.recommenders/