add my info

README_gc.md

@@ -19,6 +19,7 @@
 - [@leisore](https://github.com/leisore)
 - [@dake](https://github.com/dake)
 - [@glight2000](https://github.com/glight2000)
+- [@songleo](https://github.com/songleo)
 
 ## 适用人群