elf: Check corrupt VTENTRY relocation addend

[H.J. Lu]

Check corrupt VTENTRY relocation addend to avoid linker crash on

  h->u2.vtable->used[addend >> log_file_align] = true;

PR ld/33452
* elflink.c (bfd_elf_gc_record_vtentry): Return false if VTENTRY
relocation addend is too large.


-- 
H.J.
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