frv ld: don't warn for relocs to discarded linkonce section symbols

[Nick Clifton]

Hi Alex,

>I don't see a clean way to address this problem.  We don't know the
>section is going to be discarded in check_relocs, where we initially
>collect the information.  In size_dynamic_sections, we can't get to
>the local symbol/section table of the bfd to tell whether the section
>was discarded either.  Then, in relocate_section, the relocation was
>already modified and we can't get back the information we need to tell
>which entry we should get the information from.  So I'm just punting
>at it and disabling the warning at this point.  If it turns out that
>we emit a different number of dynamic relocations than initially
>estimated, we'll still get a warning.
>
>
>Anyhow...  Here's the patch.  Ok?
>  
>
OK - please apply.

Cheers
  Nick