Rev the version of apache ant in third_party to 1.8.4. This will fix an issue with

third_party/apache_ant/README

Index: third_party/apache_ant/README
===================================================================
--- third_party/apache_ant/README	(revision 17153)
+++ third_party/apache_ant/README	(working copy)
@@ -1,17 +1,97 @@
-URL: http://apache.opensourceresources.org/ant/binaries/apache-ant-1.7.1-bin.tar.gz
-Version: 1.7.1
-License: Apache License 2.0
-License File: LICENSE
 
-Description:
-Ant is a Java based build tool. In theory it is kind of like "make"
-without makes wrinkles and with the full portability of pure java code.
+                                 A     N     T
+ 
 
-Local Modifications:
-* Modified bin/ant to look in the ant.runfiles directory
-  generated by the google3 BUILD system for its data.
+  What is it? 
+  -----------
+  
+  Ant is a Java based build tool. In theory it is kind of like "make" 
+  without makes wrinkles and with the full portability of pure java code.
 
-* Removed from ant.jar: 
-org/apache/tools/bzip2/...
-Added dep: //third_party/java/bzip2
+  
+  Why?
+  ----
+  
+  Why another build tool when there is already make, gnumake, nmake, jam, 
+  and others? Because all of those tools have limitations that its original 
+  author couldn't live with when developing software across multiple platforms. 
+  
+  Make-like tools are inherently shell based. They evaluate a set of 
+  dependencies and then execute commands not unlike what you would issue on a 
+  shell. This means that you can easily extend these tools by using or writing 
+  any program for the OS that you are working on. However, this also means that 
+  you limit yourself to the OS, or at least the OS type such as Unix, that you 
+  are working on.
+  
+  Makefiles are inherently evil as well. Anybody who has worked on them for any 
+  time has run into the dreaded tab problem. "Is my command not executing 
+  because I have a space in front of my tab!!!" said the original author of Ant 
+  way too many times. Tools like Jam took care of this to a great degree, but 
+  still use yet another format to use and remember.
+  
+  Ant is different. Instead a model where it is extended with shell based 
+  commands, it is extended using Java classes. Instead of writing shell 
+  commands, the configuration files are XML based calling out a target tree 
+  where various tasks get executed. Each task is run by an object which 
+  implements a particular Task interface.
+  
+  Granted, this removes some of the expressive power that is inherent by being 
+  able to construct a shell command such as `find . -name foo -exec rm {}` but 
+  it gives you the ability to be cross platform. To work anywhere and 
+  everywhere. And hey, if you really need to execute a shell command, Ant has 
+  an exec rule that allows different commands to be executed based on the OS 
+  that it is executing on.
 
+  The Latest Version
+  ------------------
+
+  Details of the latest version can be found on the Apache Ant
+  Project web site <http://ant.apache.org/>.
+
+
+  Documentation
+  -------------
+
+  Documentation is available in HTML format, in the docs/ directory.
+  For information about building and installing Ant, see
+  docs/manual/index.html
+
+
+  Licensing
+  ---------
+
+  This software is licensed under the terms you may find in the file 
+  named "LICENSE" in this directory.
+  
+  This distribution includes cryptographic software.  The country in 
+  which you currently reside may have restrictions on the import, 
+  possession, use, and/or re-export to another country, of 
+  encryption software.  BEFORE using any encryption software, please 
+  check your country's laws, regulations and policies concerning the
+  import, possession, or use, and re-export of encryption software, to 
+  see if this is permitted.  See <http://www.wassenaar.org/> for more
+  information.
+
+  The U.S. Government Department of Commerce, Bureau of Industry and
+  Security (BIS), has classified this software as Export Commodity 
+  Control Number (ECCN) 5D002.C.1, which includes information security
+  software using or performing cryptographic functions with asymmetric
+  algorithms.  The form and manner of this Apache Software Foundation
+  distribution makes it eligible for export under the License Exception
+  ENC Technology Software Unrestricted (TSU) exception (see the BIS 
+  Export Administration Regulations, Section 740.13) for both object 
+  code and source code.
+
+  The following provides more details on the included cryptographic
+  software:
+
+  For the SSH family of tasks (<sshexec> and <scp>) Ant requires the
+  JSch <http://www.jcraft.com/jsch/index.html> library as well as the
+  Java Cryptography extensions
+  <http://java.sun.com/javase/technologies/security/>.  Ant does not
+  include these libraries itself, but is designed to use them.
+
+  Thanks for using Ant.
+
+                                          The Apache Ant Project
+                                         <http://ant.apache.org/>