patches for xml related stuff

[e.sammer]

these patches fix some simple include problems with a few files with 
regard to libxml. libxml2 now does not include 
-I/usr/include/libxml/libxml2 in the output of xml2-config --cflags 
therefor causing things like #include <xmlversion.h> to fail.

the first patch, pathxml.m4.diff, fixes base/config/pathxml.m4 the test 
case when running configure. of course, autoconf should be run after 
applying this patch so configure is updated.

the second patch fixes one or two include lines in base/Tools/gsdoc.m to 
include the files properly.

as a side note, these patches will *not* break older versions of libxml 
(1 or 2).

--
eric sammer <eric@linuxstep.org>
LinuxSTEP   <http://www.linuxstep.org>
InterfaceWM <http://interfacewm.sourceforge.net>

Index: config/pathxml.m4
===================================================================
RCS file: /cvsroot/gnustep/gnustep/core/base/config/pathxml.m4,v
retrieving revision 1.1
diff -r1.1 pathxml.m4
50,51c50,51
< #include <xmlversion.h>
< #include <parser.h>
---
> #include <libxml/xmlversion.h>
> #include <libxml/parser.h>

Index: Tools/gsdoc.m
===================================================================
RCS file: /cvsroot/gnustep/gnustep/core/base/Tools/gsdoc.m,v
retrieving revision 1.17
diff -r1.17 gsdoc.m
92c92
< #include <parser.h>
---
> #include <libxml/parser.h>