* write.c (write_relocs): Use S_IS_DEFINED and S_IS_COMMON rather

	* write.c (write_relocs): Use S_IS_DEFINED and S_IS_COMMON rather
	than comparing S_GET_SEGMENT to undefined_section.
	(write_object_file): Skip symbols which were equated to an
	undefined or common symbol.
	* symbols.c (resolve_symbol_value): Use S_IS_DEFINED and
	S_IS_COMMON rather than comparing S_GET_SEGMENT to
	undefined_section.
	(S_GET_VALUE): Likewise.  Avoid recursion problems if S_IS_DEFINED
	or S_IS_COMMON call S_GET_VALUE.
	* config/obj-aout.h (S_IS_COMMON): Define if not BFD_ASSEMBLER.
	* config/obj-aout.c (obj_emit_relocations): If a reloc is equated
	to an undefined or common symbol, convert the reloc to be against
	the target symbol.
	(obj_crawl_symbol_chain): Skip symbols which were equated to an
	undefined or common symbol.
	* config/obj-bout.h (S_IS_COMMON): Define if not BFD_ASSEMBLER.
	* config/obj-bout.c (obj_emit_relocations): If a reloc is equated
	to an undefined or common symbol, convert the reloc to be against
	the target symbol.
	(obj_crawl_symbol_chain): Skip symbols which were equated to an
	undefined or common symbol.
	* config/obj-coff.c (do_relocs_for): Use S_IS_DEFINED and
	S_IS_COMMON rather than comparing S_GET_SEGMENT to
	undefined_section.
	(yank_symbols): Skip symbols which were equated to an undefined or
	common symbol.