[PATCH] Handle DWARF4 .debug_frame (and .eh_frame)

[Cary Coutant]

> bfd/
>        * elf-eh-frame.c (_bfd_elf_parse_eh_frame): Handle CIE version 4
>        provided that it has the expected address size and zero segment
>        length.
> binutils/
>        * dwarf.c (struct Frame_Chunk): Add ptr_size and segment_size
>        fields.
>        (display_debug_frames): Handle CIE version 4.

I can't approve changes, but it looks good to me. Thanks for noticing
this -- I had forgotten about the CIE changes.

-cary