* peicode.h (coff_swap_aouthdr_out): For PPC PE, start isize at 0,

	* peicode.h (coff_swap_aouthdr_out): For PPC PE, start isize at 0,
	not at the file position of the first section.
	* coffcode.h (coff_compute_section_file_positions): Avoid using
	unportable #elif.
	(coff_write_object_contents): When generating a PPC PE executable
	with no symbols, round up the file size to a COFF_PAGE_SIZE
	boundary.
	* cofflink.c (_bfd_coff_final_link): If there are no symbols,
	don't write out a string table.