Complete information generated through the array descriptor language hook

Complete information generated through the array descriptor language hook

gcc/
	* dwarf2out.h (enum array_descr_ordering): New.
	(array_descr_dimen): Add a bounds_type structure field.
	(struct array_descr_info): Add a field to hold index type information
	and another one to hold ordering information.
	* dwarf2out.c (gen_type_die_with_usage): Get the main variant before
	invoking the array descriptor language hook.  Initialize the
	array_descr_info structure before calling the lang-hook.
	(gen_descr_array_type_die): Use gen_type_die if not processing the main
	type variant.  Replace Fortran-specific code with generic one using
	this new field.  Add a GNAT descriptive type, if any.  Output type
	information for the array bound subrange, if any.

gcc/fortran
	* trans-types.c (gfc_get_array_descr_info): Describe all Fortran arrays
	with column major ordering.

From-SVN: r218823