decl.c (gnat_to_gnu_entity, [...]): Make constant variant of designated type for...

decl.c (gnat_to_gnu_entity, [...]): Make constant variant of designated type for Is_Access_Constant.

	* decl.c (gnat_to_gnu_entity, case E_General_Access_Type):
	Make constant variant of designated type for Is_Access_Constant.
	Call update_pointer_to with main variant.

	* trans.c (process_freeze_entity, process_type):
	Call update_pointer_to on main variant.

	* utils.c (update_pointer_to): Make corresponding variant for NEW_TYPE.
	If main variant, update all other variants.

	* utils2.c (build_unary_op, case INDIRECT_REF): No longer set
	TREE_STATIC.

From-SVN: r46547