[xml] Light libxml2

[Amir Yiron <amir WavionNetworks com>]

Hello!

Compiling the source as is outputs with a huge library of more than 4M size
(on Linux).
I need a basic and small library with XML read/write (optionally with SAX),
but without the other goodies (schema, xpath, html, etc.).

Could somebody let me know what sources/objects are required and how to
customize the Makefile for that?

Thanks in advance,
-- Amir