binutils/

binutils/

	* doc/binutils.texi (objcopy): Add --strip-dwo, --extract-dwo options.
	(strip): Add --strip-dwo option.
	* objcopy.c (enum strip_action): Add STRIP_DWO, STRIP_NONDWO.
	(enum command_line_switch): Add OPTION_EXTRACT_DWO, OPTION_STRIP_DWO.
	(strip_options): Add --strip-dwo option.
	(copy_options): Add --extract-dwo, --strip-dwo options.
	(copy_usage): Likewise.
	(strip_usage): Add --strip-dwo option.
	(is_dwo_section): New function.
	(is_strip_section_1): Check for DWO sections.
	(copy_object): Check for --strip-dwo, --extract-dwo options.
	(copy_relocations_in_section): Discard relocations for DWO sections.
	Discard entire relocation section when no relocations.
	(strip_main): Add --strip-dwo option.
	(copy_main): Add --strip-dwo, --extract-dwo options.