[AArch64] PR18270, fix handling of GOT entry for local symbol

[Nicholas Clifton]

Hi Jiong,

> bfd/
>    PR18270
>    * elfnn-aarch64.c (elfNN_aarch64_size_dynamic): Count local symbol for
>    GOT_NORMAL for both sgot/srelgot section.
>    (elfNN_aarch64_final_link_relocate): Relocate against GOT entry
>    address and generate necessary runtime relocation for GOT entry.

Approved - but ... I do not like having calls to abort() inside a 
library.  It rarely helps the user.  It would be better I think to 
replace them with calls to bdf_error_handler, providing an error message 
that tells the user that there has been an internal error.

Cheers
   Nick