JDK 9 RFR of JDK-8035452: Fix serial lint warnings in core libs

[Joe Darcy]

Hello,

Please review the patch below which will address the handful of 
remaining serial lint warning in the core libraries.

Thanks,

-Joe

diff -r e5a09bc70308 src/share/classes/java/util/EnumSet.java
--- a/src/share/classes/java/util/EnumSet.java    Thu Feb 20 13:03:36 
2014 +0000
+++ b/src/share/classes/java/util/EnumSet.java    Thu Feb 20 12:32:52 
2014 -0800
@@ -80,6 +80,8 @@
  public abstract class EnumSet<E extends Enum<E>> extends AbstractSet<E>
      implements Cloneable, java.io.Serializable
  {
+    private static final long serialVersionUID = 1009687484059888093L;
+
      /**
       * The class of all the elements of this set.
       */
diff -r e5a09bc70308 src/share/classes/java/util/TreeMap.java
--- a/src/share/classes/java/util/TreeMap.java    Thu Feb 20 13:03:36 
2014 +0000
+++ b/src/share/classes/java/util/TreeMap.java    Thu Feb 20 12:32:52 
2014 -0800
@@ -1333,6 +1333,7 @@
      /**
       * @serial include
       */
+    @SuppressWarnings("serial") // Abstract class
      abstract static class NavigableSubMap<K,V> extends AbstractMap<K,V>
          implements NavigableMap<K,V>, java.io.Serializable {
          /**
diff -r e5a09bc70308 
src/share/classes/sun/reflect/annotation/ExceptionProxy.java
--- a/src/share/classes/sun/reflect/annotation/ExceptionProxy.java Thu 
Feb 20 13:03:36 2014 +0000
+++ b/src/share/classes/sun/reflect/annotation/ExceptionProxy.java Thu 
Feb 20 12:33:21 2014 -0800
@@ -37,5 +37,6 @@
   * @since   1.5
   */
  public abstract class ExceptionProxy implements java.io.Serializable {
+    private static final long serialVersionUID = 7241930048386631401L;
      protected abstract RuntimeException generateException();
  }