Fix --log-stdout CLI option renamed to --debug-stdout in latest smbd version

[pirate]

Fix for this issue:

 Usage: smbd [-?bDiFV] [-?|--help] [--usage] [-b|--build-options]
samba_1  |         [-p|--port=STRING] [-P|--profiling-level=PROFILE_LEVEL]
samba_1  |         [-d|--debuglevel=DEBUGLEVEL] [--debug-stdout]
samba_1  |         [-s|--configfile=CONFIGFILE] [--option=name=value]
samba_1  |         [-l|--log-basename=LOGFILEBASE] [--leak-report] [--leak-report-full]
samba_1  |         [-D|--daemon] [-i|--interactive] [-F|--foreground]
samba_1  |         [--no-process-group] [-V|--version]
samba_1  | 2021-12-15 22:56:41,379 INFO exited: smbd (exit status 1; not expected)
samba_1  | 2021-12-15 22:56:43,382 INFO spawned: 'smbd' with pid 18
samba_1  |
samba_1  | Invalid option --log-stdout: unknown option

By changing the CLI launch arg from --log-stdout to --debug-stdout.
See the smdb changelog for more info: https://www.samba.org/samba/history/samba-4.15.0.html