[components][net] In SConscript file, replace RT_USING_LWIP140 with RT_USING_LWIP141

components/net/SConscript

@@ -7,8 +7,8 @@ objs = []
 cwd = GetCurrentDir()
 list = os.listdir(cwd)
 
-# the default version of LWIP is 1.4.1
-if not GetDepend('RT_USING_LWIP132') and not GetDepend('RT_USING_LWIP140') and not GetDepend('RT_USING_LWIP202'):
+# the default version of LWIP is 2.0.2
+if not GetDepend('RT_USING_LWIP132') and not GetDepend('RT_USING_LWIP141') and not GetDepend('RT_USING_LWIP202'):
     AddDepend('RT_USING_LWIP202')
 
 for d in list: