JDK 9 RFR of JDK-8031747: Add overloads lint warning to build of jdk repository

[Joe Darcy]

Hello,

With the lint warnings cleanup continuing, we are close to ridding the 
jdk repository of the "overloads" warning; remaining work there is out 
for review (JDK-8031550: Fix overloads lint warnings in client code).

Once that fix gets pushed AND if a jprt build of the full open + closed 
forest is successful, I like to push the patch below which adds 
"overloads" to the list of lint warnings enabled in the jdk repo.

Thanks,

-Joe

diff -r a62f87a1d65d make/Setup.gmk
--- a/make/Setup.gmk    Tue Jan 14 13:52:23 2014 -0800
+++ b/make/Setup.gmk    Tue Jan 14 18:06:03 2014 -0800
@@ -1,5 +1,5 @@
  #
-# Copyright (c) 2011, 2013, Oracle and/or its affiliates. All rights 
reserved.
+# Copyright (c) 2011, 2014, Oracle and/or its affiliates. All rights 
reserved.
  # DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  #
  # This code is free software; you can redistribute it and/or modify it
@@ -27,7 +27,7 @@

  # To build with all warnings enabled, do the following:
  # make JAVAC_WARNINGS="-Xlint:all -Xmaxwarns 10000"
-JAVAC_WARNINGS := 
-Xlint:-unchecked,-deprecation,-overrides,auxiliaryclass,classfile,dep-ann,divzero,empty,try,varargs 
-Werror
+JAVAC_WARNINGS := 
-Xlint:-unchecked,-deprecation,-overrides,auxiliaryclass,classfile,dep-ann,divzero,empty,overloads,try,varargs 
-Werror

  # Any java code executed during a JDK build to build other parts of 
the JDK must be
  # executed by the bootstrap JDK (probably with -Xbootclasspath/p: ) 
and for this