[wwwdocs] gcc-10/changes.html - Document new ARM FDPIC ABI support

[Christophe Lyon]

Hi,

As Kyrill suggested, here is a patch to mention the new FDPIC ABI
support for arm.
OK?

Thanks,

Christophe
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Index: changes.html
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RCS file: /cvs/gcc/wwwdocs/htdocs/gcc-10/changes.html,v
retrieving revision 1.14
diff -r1.14 changes.html
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< <!-- <h3 id="arm">ARM</h3> -->
< 
---
> <h3 id="arm">ARM</h3>
> <ul>
>   <li>Support for the FDPIC ABI has been added. It uses 64-bit
>   function descriptors to represent points to functions, and enables
>   code sharing on MMU-less systems.
>   </li>
> </ul>