Upgrade to libxml 2.9.2 and libxslt 1.1.28

third_party/libxslt/win32/configure.js

 /* Configure script for libxslt, specific for Windows with Scripting Host.
  * 
  * This script will configure the libxslt build process and create necessary files.
  * Run it with an 'help', or an invalid option and it will tell you what options
  * it accepts.
  *
  * March 2002, Igor Zlatkovic <igor@zlatkovic.com>
  */
 
 /* The source directory, relative to the one where this file resides. */
@@ skipping 443 matching lines @@
 if (error != 0) {
         WScript.Echo("Configuration failed, aborting.");
         WScript.Quit(error);
 }
 
 // Create the Makefile.
 var fso = new ActiveXObject("Scripting.FileSystemObject");
 var makefile = ".\\Makefile.msvc";
 if (compiler == "mingw")
         makefile = ".\\Makefile.mingw";
-var new_makefile = ".\\Makefile";
-var f = fso.FileExists(new_makefile);
-if (f) {
-       var t = fso.GetFile(new_makefile);
-       t.Attributes =0;
-}
-fso.CopyFile(makefile, new_makefile, true);
+fso.CopyFile(makefile, ".\\Makefile", true);
 WScript.Echo("Created Makefile.");
 // Create the config.h.
 var confighsrc = "..\\libxslt\\win32config.h";
 var configh = "..\\config.h";
 var f = fso.FileExists(configh);
 if (f) {
         var t = fso.GetFile(configh);
         t.Attributes =0;
 }
 fso.CopyFile(confighsrc, configh, true);
@@ skipping 23 matching lines @@
 txtOut += "    Install prefix: " + buildPrefix + "\n";
 txtOut += "      Put tools in: " + buildBinPrefix + "\n";
 txtOut += "    Put headers in: " + buildIncPrefix + "\n";
 txtOut += "Put static libs in: " + buildLibPrefix + "\n";
 txtOut += "Put shared libs in: " + buildSoPrefix + "\n";
 txtOut += "      Include path: " + buildInclude + "\n";
 txtOut += "          Lib path: " + buildLib + "\n";
 WScript.Echo(txtOut);
 
 // Done.