Correct spelling of DW_AT_namelist_item

include/
	* dwarf2.def: Correct spelling of DW_AT_namelist_item.
gcc/
	* dwarf2out.cc (gen_namelist_decl): Adjust to suit correct
	spelling of DW_AT_namelist_item.

gcc/dwarf2out.cc

@@ -27479,7 +27479,7 @@ gen_namelist_decl (tree name, dw_die_ref scope_die, tree item_decls)
 	nml_item_ref_die = force_decl_die (value);
       nml_item_die = new_die (DW_TAG_namelist_item, nml_die, NULL);
-      add_AT_die_ref (nml_item_die, DW_AT_namelist_items, nml_item_ref_die);
+      add_AT_die_ref (nml_item_die, DW_AT_namelist_item, nml_item_ref_die);
     }
   return nml_die;
 }

include/dwarf2.def

@@ -289,7 +289,7 @@ DW_AT (DW_AT_frame_base, 0x40)
 DW_AT (DW_AT_friend, 0x41)
 DW_AT (DW_AT_identifier_case, 0x42)
 DW_AT (DW_AT_macro_info, 0x43)
-DW_AT (DW_AT_namelist_items, 0x44)
+DW_AT (DW_AT_namelist_item, 0x44)
 DW_AT (DW_AT_priority, 0x45)
 DW_AT (DW_AT_segment, 0x46)
 DW_AT (DW_AT_specification, 0x47)