[Brillo] Add XmlRpc++ library

Adding a third-party native XML RPC library for Shill testing on Brillo.

Bug: 24335496
TEST: source build/envsetup.sh && lunch aosp_shamu-userdebug && 
make -j 64

Change-Id: I7a4d86fc3ab3b85f981e1814c1ef44eab85471b5
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+<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
+<html>
+	<head>
+		<title>XmlRpc++ Library</title>
+		<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
+		<meta http-equiv="Content-language" content="en-US">
+		<meta name="author" content="Chris Morley">
+		<meta name="copyright" content="Copyright © 2003 by Chris Morley">
+	</head>
+	<body>
+		<H3>XmlRpc++ Library</H3>
+		<P>This is version 0.7 of XmlRpc++, an implementation of the <A HREF="http://www.xmlrpc.org">
+				XmlRpc protocol</A> written in C++, based upon Shilad Sen's excellent <A HREF="http://py-xmlrpc.sourceforge.net">
+				py-xmlrpc library</A>. XmlRpc++ is designed to make it easy to incorporate 
+			XmlRpc client and server support into C++ applications. Or use both client and 
+			server objects in your app for easy peer-to-peer support.
+		</P>
+		<H3>Features</H3>
+		<UL>
+			<li>
+				<STRONG>Easy</STRONG> &nbsp; This library is easy to incorporate into C++ 
+				applications. No other libraries are required, other than your system's socket 
+				libraries. Simple XML parsing and HTTP support are built in.<br>
+			<li>
+				<STRONG>Fast</STRONG> &nbsp; All IO is non-blocking, so a slow client or 
+				network will not slow down the server.<br>
+			<li>
+				<STRONG>Portable</STRONG> Written in standard C++ to the POSIX and Windows 
+				sockets APIs. You do need a fairly recent compiler (g++ 3.1 or MSVC++ .Net or 
+				MSVC++ 6 with the <A href="http://www.dinkumware.com/vc_fixes.html">STL patches</A>.)
+			</li>
+			<li>
+				<STRONG>Free</STRONG> &nbsp; This library is released under the <a href="http://www.gnu.org/">
+					GNU</a> <a href="http://www.gnu.org/copyleft/lesser.html">LGPL</a>.<br>
+				<br>
+			</li>
+		</UL>
+		<P>&nbsp;</P>
+		<h3>Changes</h3>
+		<UL>
+			<li>
+				Better handling of fault responses: server methods can throw an 
+				XmlRpcException to return a fault and XmlRpcClient has a new method to 
+				test whether the last response was a fault.</li>
+			<li>
+				Support for system.listMethods and system.methodHelp from the introspection 
+				API.</li>
+			<li>
+				Support for system.multicall to process multiple requests in a single transaction.</li>
+			<li>
+				Fixed a problem in the XmlRpcServer destructor (it should not have been deleting the methods).</li>
+			<li>
+				The server ensures a valid result value is returned even if the method does not
+				set the result. The default result is an empty string.</li>
+			<li>
+				Doxygen comments in header files and a doc target in the makefile.</li>
+		</UL>
+		<P>
+		<P>&nbsp;</P>
+		<h3>Installation</h3>
+		<P>
+			There are VC++ 6 and VC++ .Net project files building on Windows. If you are 
+			using VC++ 6, you should apply SP3 and the fixes at <A href="http://www.dinkumware.com/vc_fixes.html">
+				http://www.dinkumware.com/vc_fixes.html</A>. Be sure to set the appropriate 
+			code generation switches. In particular, ensure that the runtime library 
+			(single/multi-threaded, static library/DLL) used is the same for the XmlRpc++ 
+			code and whatever application it will be linked to.</P>
+		<P>
+			For Linux, Solaris, and other Unix-like platforms there is a GNU Makefile which 
+			can be edited to suit your system. Specify your C++ compiler, compiler flags, 
+			and your system's socket libraries.
+		</P>
+		<p>In the test directory there are various test programs that are built by default. 
+			To verify that the library built correctly, you can start the HelloServer 
+			example:<br>
+			<pre>HelloServer 8000
+			</pre>
+			and the HelloClient example in another terminal window:<br>
+			<pre>HelloClient localhost 8000
+			</pre>
+		<P>
+			You should see two Hello messages and a sum displayed (amongst a bunch of debug 
+			output). You can also try the XML server validator program (eg, "Validator 80") 
+			and then attempt to connect to it from <A href="http://validator.xmlrpc.com">http://validator.xmlrpc.com</A>
+			(if you have access to the internet and are not behind a firewall etc).
+		</P>
+		<H3>Author</H3>
+		<P><A href="mailto:cmorley@users.sourceforge.net">Chris Morley</A>
+		</P>
+		<P>Although no code was re-used, the design and structure of the library is based 
+			upon the py-xmlrpc library implementation.<BR>
+			The base64 decoder/encoder is by <A href="mailto:lostd@ukr.net">Konstantin 
+				Pilipchuk</A>.</P>
+		<P></P>
+		<H3>License</H3>
+		<p>A full copy of the LGPL license is included in the file COPYING. The source code 
+			is Copyright (c) 2002-2003 by Chris Morley. This library is free software; you 
+			can redistribute it and/or modify it under the terms of the GNU Lesser General 
+			Public License as published by the Free Software Foundation; either version 2.1 
+			of the License, or (at your option) any later version. This library is 
+			distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; 
+			without even the implied warranty of MERCHANTABILITY or FITNESS FOR A 
+			PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details. 
+			You should have received a copy of the GNU Lesser General Public License along 
+			with this library; if not, write to the Free Software Foundation, Inc., 59 
+			Temple Place, Suite 330, Boston, MA 02111-1307 USA
+		</p>
+	</body>
+</html>