* elf-bfd.h (struct eh_cie_fde): Add cie_inf, remove sec.

	* elf-bfd.h (struct eh_cie_fde): Add cie_inf, remove sec.
	(struct eh_frame_hdr_info): Add last_cie_inf, remove last_cie_offset.
	* elf-eh-frame.c (_bfd_elf_discard_section_eh_frame): Delete code
	setting offsets for removed CIEs.  Don't set "sec", instead set
	cie_inf for FDEs.  Keep a pointer to last struct eh_cie_fde for a
	CIE in hdr_info.  Only set make_relative and make_lsda_relative
	for CIEs.  Use pointers rather than array indices.
	(_bfd_elf_eh_frame_section_offset): Test/set make_relative,
	make_lsda_relative, need_* on cie_inf for FDEs.
	(_bfd_elf_write_section_eh_frame): Adjust offset and new_offset for
	section output_offset.  Delete cie_offset, instead use cie_inf
	pointer to CIE entry.  Use need_relative and need_lsda_relative on
	CIE entry for FDEs.  Use pointers rather than array indices.