Update Makefile

Author: chenglou

jscomp/others/Makefile

@@ -35,7 +35,7 @@ SOURCE_LIST= node_path node_fs node_process dict node_module js_array js_string
 	belt_MapString \
 	belt_MapInt\
 	belt_Option\
-        belt_Result\
+	belt_Result\
 	belt_internalSet\
 	belt_Set\
 	belt_MutableSet\