* cofflink.c (coff_link_input_bfd): If r_symndx is -1, don't

	* cofflink.c (coff_link_input_bfd): If r_symndx is -1, don't
	change it.
	(_bfd_coff_generic_relocate_section): If r_symndx is -1, it is an
	absolute reloc.  Don't dump core using r_symndx as an array index.
	* cf-m68klynx.c (coff_bfd_link_add_symbols): Define.
	(lynx_link_add_symbols): New static function (copy of function in
	coff-i386.c).
	(coff_m68k_lynxrtype_to_howto): sym argument may be NULL.
	* coff-i386.c (coff_i386_rtype_to_howto): Likewise.
	* coff-a29k.c (coff_a29k_relocate_section): Handle an r_symndx
	value of -1, meaning an absolute reloc.