Added missing license info

src/com/vaadin/terminal/gwt/client/AbstractFieldState.java

@@ -1,3 +1,6 @@
+/*
+@VaadinApache2LicenseForJavaFiles@
+ */
 package com.vaadin.terminal.gwt.client;
 
 import com.vaadin.ui.AbstractField;

src/com/vaadin/ui/HasComponents.java

@@ -1,3 +1,6 @@
+/*
+@VaadinApache2LicenseForJavaFiles@
+ */
 package com.vaadin.ui;
 
 import java.util.Iterator;