gas support for AIX visibility

[Nick Clifton]

Hi Ã
dne,

>  From the xlC docs: https://www.ibm.com/developerworks/aix/library/au-aix-symbol-visibility-part2/index.html
> 
> Listing 14. Syntax for specifying visibility attribute in assembly
>  Â Â  .extern Name [ , Visibility ]
>     .globl  Name [ , Visibility ]
>     .weak   Name [ , Visibility ]
>     .comm   Name, Expression [, Number [, Visibility ] ]

Please could you file this as an enhancement request on the bugzilla system:

  https://sourceware.org/bugzilla/

That way we can track and, someday, actually implement the support.

Cheers
  Nick