dwarf2out.c (die_checksum_ordered): Don't include template instantiations in signature.

gcc/
	* dwarf2out.c (die_checksum_ordered): Don't include template
	instantiations in signature.
	(is_template_parameter): New function.
	(is_template_instantiation): New function.
	(generate_skeleton_bottom_up): Don't include template instantiations
	in type unit DIE.
	(generate_skeleton): Likewise.
	(break_out_comdat_types): Move recursive call to break out nested
	types earlier.
	(prune_unused_types_mark_generic_parms_dies): Call
	is_template_parameter.

From-SVN: r201275