修改il2cpp linker错误，原因是使用了asmdef，程序集名字变了

Unity/Assets/link.xml

 <linker>
-  <assembly fullname="Assembly-CSharp" preserve="all"/>
-  <assembly fullname="Assembly-CSharp-firstpass" preserve="all"/>
+  <assembly fullname="Unity.Model" preserve="all"/>
+  <assembly fullname="Unity.ThirdParty" preserve="all"/>
   <assembly fullname="UnityEngine" preserve="all"/>
   <assembly fullname="System" preserve="all"/>
 </linker>
\ No newline at end of file