Make ld -N more reasonable for ELF:

	Make ld -N more reasonable for ELF:
	* elf.c (map_sections_to_segments): If D_PAGED is not set, set
	phdr_in_section to false, and always use a single load segment.
	(elf_sort_sections): Sort sections by LMA after VMA.
	(assign_file_positions_for_segments): If D_PAGED is not set, don't
	align to maxpagesize.
	(assign_file_positions_except_relocs): Likewise.
	* elfcode.h (elf_object_p): If a section is loaded but not page
	aligned, clear D_PAGED.