fix a multi-toc related ppc64 segfault

[Olaf Hering]

 On Fri, Jun 20, Alan Modra wrote:

> We build htab->stub_group, an array indexed by section id, before any
> stub sections have been added.  Consequently, if a symbol gets defined
> in a stub section as can happen in ppc_build_one_stub for
> ppc_stub_plt_call, its section id will be too big for the array.
> 
> 	* elf64-ppc.c (struct ppc_link_hash_table): Add top_id.
> 	(ppc64_elf_setup_section_lists): Set it.
> 	(ppc64_elf_relocate_section): Check sym section id against top_id.
> 	(ppc_build_one_stub): Comment on top_id.

Yes, that fixed the segfault. Thanks.


Gruss Olaf

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