decl.c (gnat_to_gnu_entity): Pass the list of attributes when building the corresponding variable of a constant.

	* gcc-interface/decl.c (gnat_to_gnu_entity) <E_Variable>: Pass the list
	of attributes when building the corresponding variable of a constant.
	* gcc-interface/utils.c (create_var_decl_1): Do not process attributes
	for constants.

From-SVN: r154458