LibJS: Set name of anonymous functions during assignment

Author: https://github.com/linusg
Commit: 25cf0da2fb
Pull-request: https://github.com/SerenityOS/serenity/pull/2070

Libraries/LibJS/Runtime/ScriptFunction.h

@@ -45,6 +45,7 @@ public:
     virtual Value construct(Interpreter&) override;
 
     virtual const FlyString& name() const override { return m_name; };
+    void set_name(const FlyString& name) { m_name = name; };
 
 private:
     virtual bool is_script_function() const final { return true; }