[PATCH ARC 1/5]: Dynamic relocs verification for dynindx == -1

[Cupertino Miranda]

Hi all,

Please review.
This patch strengths verification that no dynamic relocation is
generated with an invalid symbol.

Best regards,
Cupertino

bfd/ChangeLog:

Cupertino Miranda  <cmiranda@synopsys.com>
    elf32-arc.c (name_for_global_symbol): Added assert to check for
    symbol index.
    (elf_arc_relocate_section): Added and changed asserts, validating
    the synamic symbol index.
    (elf_arc_finish_dynamic_symbol): Do not fill the dynamic relocation
    if symbol has dynindx set to -1.

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