dwarfless failures on ppc64

[Srinivasa DS]

> Srini, attached are two patches:
> 1. powerpc_symtab.patch, which I sent you Monday
> 2. weak_symbols.patch, which applies atop #1
> 
> Please let me know whether these fixes resolve the powerpc failures
> you're seeing.  If not, please send me your results, as previously
> discussed.
> 

Jim
  I have applied the patch and Now testsuite/nodwf01[2][3].stp works 
fine. Thanks for the fix.

Thanks
  Srinivasa DS