Merge branch 'chore/add_cmake_script_for_lwip' into 'master'

feat(lwip): Add cmake script

See merge request sdk/ESP8266_RTOS_SDK!128

Author: wujiangang

components/lwip/CMakeLists.txt

@@ -0,0 +1,27 @@
+set(COMPONENT_ADD_INCLUDEDIRS
+    include
+    lwip/src/include
+    lwip/src/include/lwip
+    lwip/src/include/posix
+    lwip/src/include/lwip
+    include/lwip/apps
+    include/lwip/port
+    apps)
+
+set(COMPONENT_SRCDIRS
+    lwip/src/api
+    lwip/src/apps/sntp
+    lwip/src/netif
+    lwip/src/core
+    lwip/src/core/ipv4
+    lwip/src/core/ipv6
+    port/freertos
+    port/netif
+    apps/dhcpserver
+    apps/multi-threads)
+
+set(COMPONENT_REQUIRES tcpip_adapter esp8266 freertos)
+
+register_component()
+
+component_compile_options(-Wno-address)