xerces-c : add new recipe

Xerces-C++ is a validating XML parser written in a portable subset of C++.
Xerces-C++ makes it easy to give your application the ability to read and write
XML data. A shared library is provided for parsing, generating, manipulating,
and validating XML documents using the DOM, SAX, and SAX2 APIs

Signed-off-by: Jagadeesh Krishnanjanappa <jkrishnanjanappa@mvista.com>
Signed-off-by: Martin Jansa <Martin.Jansa@gmail.com>