Enable hidden option -l

[Eli Zaretskii]

> From: Andreas Schwab <schwab@suse.de>
> Date: Tue, 07 Dec 2004 00:42:04 +0100
> 
> 2004-12-07  Andreas Schwab  <schwab@suse.de>
> 
> 	* main.c (long_options): Add entry for "-l".
> 	(print_gdb_help): Add line for -l option.
> 
> doc/
> 	* gdb.texinfo (Mode Options): Document -l option.

The gdb.texinfo patch is approved.  Thanks.

If the code is approved (I personally am in favor), I think we shiould
document this in NEWS as well.