gold/
	* output.cc (Output_segment::set_section_addresses): Take new
	Target* argument.  If target->isolate_execinstr() and the segment
	is executable and starts at a target->abi_pagesize() boundary,
	pad its end out to a target->abi_pagesize() boundary with code fill.
	* output.h (Output_segment::set_section_addresses): Update decl.
	* layout.h (Layout::check_output_data_for_reset_values): Take new
	argument RELAX_OUTPUTS.
	(Layout): New member relax_output_list_.
	(Layout::add_relax_output): New method.
	* layout.cc (Layout::Layout): Update constructor.
	(Layout::reset_relax_output): New method.
	(Layout::clean_up_after_relaxation): Call it.
	(Layout::prepare_for_relaxation): Update caller.
	(Layout::set_segment_offsets): Update callers of set_section_addresses.
	Call reset_relax_output before re-processing segments for
	isolate_execinstr case.
	(Layout::write_data): Handle relax_output_list_.
	(Layout::Relaxation_debug_check::check_output_data_for_reset_values):
	Take new argument RELAX_OUTPUTS.  Assert it's an empty collection.