libxml2: Disable unused XINCLUDE and SCHEMAS, and missing VALID on Mac.

third_party/libxml/win32/xmlversion.h

 /*
  * Summary: compile-time version informations
  * Description: compile-time version informations for the XML library
  *
  * Copy: See Copyright for the status of this software.
  *
  * Author: Daniel Veillard
  */
 
 #ifndef __XML_VERSION_H__
@@ skipping 246 matching lines @@
  */
 #if 1
 #define LIBXML_XPTR_ENABLED
 #endif
 
 /**
  * LIBXML_XINCLUDE_ENABLED:
  *
  * Whether XInclude is configured in
  */
-#if 1
+#if 0
 #define LIBXML_XINCLUDE_ENABLED
 #endif
 
 /**
  * LIBXML_ICONV_ENABLED:
  *
  * Whether iconv support is available
  */
 #if 0
 #define LIBXML_ICONV_ENABLED
@@ skipping 78 matching lines @@
  */
 #if 1
 #define LIBXML_EXPR_ENABLED
 #endif
 
 /**
  * LIBXML_SCHEMAS_ENABLED:
  *
  * Whether the Schemas validation interfaces are compiled in
  */
-#if 1
+#if 0
 #define LIBXML_SCHEMAS_ENABLED
 #endif
 
 /**
  * LIBXML_SCHEMATRON_ENABLED:
  *
  * Whether the Schematron validation interfaces are compiled in
  */
 #if 1
 #define LIBXML_SCHEMATRON_ENABLED
@@ skipping 103 matching lines @@
  */
 #define LIBXML_ATTR_FORMAT(fmt,args)
 #endif /* __GNUC__ */
 
 #ifdef __cplusplus
 }
 #endif /* __cplusplus */
 #endif