error.c (cp_printers): Add 'F' escape character.

error.c (cp_printers): Add 'F' escape character.

	* error.c (cp_printers): Add 'F' escape character.
	(dump_type_real): Remove TREE_LIST (fnargs) printing.
	Functionality moved to dump_parameters.
	(dump_type_suffix): Use dump_parameters and dump_exception_spec.
	(dump_function_decl): Extend meaning of V parameter. Use
	dump_parameters and dump_exception_spec.
	(dump_parameters): New static function.
	(dump_exception_spec): New static function.
	(fndecl_as_string): Change argument semantics. Use
	dump_function_decl directly.
	* sig.c (build_signature_table_constructor): Use cp_error.

From-SVN: r25741