* gold.h (Incremental_argument_list): Remove (invalid) forward

	* gold.h (Incremental_argument_list): Remove (invalid) forward
	declaration.
	* incremental.cc (Incremental_inputs::report_achive): New method.
	(Incremental_inputs::report_object): New method.
	(Incremental_inputs::report_script): New method.
	(Incremental_inputs::finalize_inputs): New method.
	(Incremental_inputs::finalize): Call finalize_inputs().
	(Incremental_inputs::sized_create_incremental_inputs_section_data):
	Create inputs entries.
	* incremental.h (Incremental_input_type): New enum.
	(Incremental_inputs::Incremental_input): Initialize new fields.
	(Incremental_inputs::report_inputs): New method.
	(Incremental_inputs::report_achive): New method.
	(Incremental_inputs::report_object): New method.
	(Incremental_inputs::report_script): New method.
	(Incremental_inputs::finalize_inputs): New method.
	(Incremental_inputs::Input_info): New struct.
	(Incremental_inputs::Input_info_map): New typedef.
	(Incremental_inputs::lock_): New field.
	(Incremental_inputs::Inputs_): New field.
	(Incremental_inputs::Inputs_map): New field.
	* main.cc (main): Call Incremental_input::report_inputs.
	* options.h (Input_argument_list): Typedef moved from
	Input_arguments.
	(Input_file_group::Files): Remove, use ::Input_argument_list.
	(Input_file_group::Input_argument_list): Remove, use
	::Input_argument_list.
	* plugin.cc (Plugin_manager::add_input_file): Add error in
	incremental build.
	* read_syms.cc (do_read_syms): Call Incremental_input::report_*
	functions.
	* script.cc (read_input_script): Call
	Incremental_input::report_script.
	* script.h (Script_info): New class.