fix build regression and add copyright headers

classpath/java/lang/invoke/CallSite.java

@@ -1,3 +1,13 @@
+/* Copyright (c) 2008-2016, Avian Contributors
+
+   Permission to use, copy, modify, and/or distribute this software
+   for any purpose with or without fee is hereby granted, provided
+   that the above copyright notice and this permission notice appear
+   in all copies.
+
+   There is NO WARRANTY for this software.  See license.txt for
+   details. */
+
 package java.lang.invoke;
 
 public class CallSite {

classpath/java/lang/invoke/LambdaConversionException.java

@@ -1,3 +1,13 @@
+/* Copyright (c) 2008-2016, Avian Contributors
+
+   Permission to use, copy, modify, and/or distribute this software
+   for any purpose with or without fee is hereby granted, provided
+   that the above copyright notice and this permission notice appear
+   in all copies.
+
+   There is NO WARRANTY for this software.  See license.txt for
+   details. */
+
 package java.lang.invoke;
 
 public class LambdaConversionException extends java.lang.Exception {

classpath/java/lang/invoke/LambdaMetafactory.java

@@ -1,3 +1,13 @@
+/* Copyright (c) 2008-2016, Avian Contributors
+
+   Permission to use, copy, modify, and/or distribute this software
+   for any purpose with or without fee is hereby granted, provided
+   that the above copyright notice and this permission notice appear
+   in all copies.
+
+   There is NO WARRANTY for this software.  See license.txt for
+   details. */
+
 package java.lang.invoke;
 
 import static avian.Stream.write1;

classpath/java/lang/invoke/MethodHandle.java

@@ -1,3 +1,13 @@
+/* Copyright (c) 2008-2016, Avian Contributors
+
+   Permission to use, copy, modify, and/or distribute this software
+   for any purpose with or without fee is hereby granted, provided
+   that the above copyright notice and this permission notice appear
+   in all copies.
+
+   There is NO WARRANTY for this software.  See license.txt for
+   details. */
+
 package java.lang.invoke;
 
 import avian.Classes;

classpath/java/lang/invoke/MethodHandles.java

@@ -1,3 +1,13 @@
+/* Copyright (c) 2008-2016, Avian Contributors
+
+   Permission to use, copy, modify, and/or distribute this software
+   for any purpose with or without fee is hereby granted, provided
+   that the above copyright notice and this permission notice appear
+   in all copies.
+
+   There is NO WARRANTY for this software.  See license.txt for
+   details. */
+
 package java.lang.invoke;
 
 public class MethodHandles {

classpath/java/lang/invoke/MethodType.java

@@ -1,3 +1,13 @@
+/* Copyright (c) 2008-2016, Avian Contributors
+
+   Permission to use, copy, modify, and/or distribute this software
+   for any purpose with or without fee is hereby granted, provided
+   that the above copyright notice and this permission notice appear
+   in all copies.
+
+   There is NO WARRANTY for this software.  See license.txt for
+   details. */
+
 package java.lang.invoke;
 
 import static avian.Assembler.*;

classpath/java/lang/invoke/SerializedLambda.java

@@ -0,0 +1,48 @@
+/* Copyright (c) 2008-2016, Avian Contributors
+
+   Permission to use, copy, modify, and/or distribute this software
+   for any purpose with or without fee is hereby granted, provided
+   that the above copyright notice and this permission notice appear
+   in all copies.
+
+   There is NO WARRANTY for this software.  See license.txt for
+   details. */
+
+package java.lang.invoke;
+
+public class SerializedLambda implements java.io.Serializable {
+  public int getImplMethodKind() {
+    // todo
+    return 0;
+  }
+
+  public String getImplClass() {
+    // todo
+    return null;
+  }
+
+  public String getImplMethodName() {
+    // todo
+    return null;
+  }
+
+  public String getImplMethodSignature() {
+    // todo
+    return null;
+  }
+
+  public String getFunctionalInterfaceClass() {
+    // todo
+    return null;
+  }
+
+  public String getFunctionalInterfaceMethodName() {
+    // todo
+    return null;
+  }
+
+  public String getFunctionalInterfaceMethodSignature() {
+    // todo
+    return null;
+  }
+}