Update libxml to 2.7.7.

third_party/libxml/runsuite.c

 /*
  * runsuite.c: C program to run libxml2 againts published testsuites 
  *
  * See Copyright for the status of this software.
  *
  * daniel@veillard.com
  */
 
 #ifdef HAVE_CONFIG_H
 #include "libxml.h"
@@ skipping 289 matching lines @@
     xmlXPathFreeObject(res);
     return(ret);
 }
 
 /************************************************************************
  *                                                                      *
  *              Test test/xsdtest/xsdtestsuite.xml                      *
  *                                                                      *
  ************************************************************************/
 
-static int 
+static int
 xsdIncorectTestCase(xmlNodePtr cur) {
     xmlNodePtr test;
     xmlBufferPtr buf;
     xmlRelaxNGParserCtxtPtr pctxt;
     xmlRelaxNGPtr rng = NULL;
     int ret = 0, memt;
 
     cur = getNext(cur, "./incorrect[1]");
     if (cur == NULL) {
         return(0);
     }
-    
+
     test = getNext(cur, "./*");
     if (test == NULL) {
         test_log("Failed to find test in correct line %ld\n",
                 xmlGetLineNo(cur));
         return(1);
     }
 
     memt = xmlMemUsed();
     extraMemoryFromResolver = 0;
     /*
@@ skipping 18 matching lines @@
         ret = 1;
         goto done;
     }
 
 done:
     if (buf != NULL)
         xmlBufferFree(buf);
     if (rng != NULL)
         xmlRelaxNGFree(rng);
     xmlResetLastError();
-    if ((memt != xmlMemUsed()) && (extraMemoryFromResolver == 0)) {
+    if ((memt < xmlMemUsed()) && (extraMemoryFromResolver == 0)) {
         test_log("Validation of tests starting line %ld leaked %d\n",
                 xmlGetLineNo(cur), xmlMemUsed() - memt);
         nb_leaks++;
     }
     return(ret);
 }
 
 static void
 installResources(xmlNodePtr tst, const xmlChar *base) {
     xmlNodePtr test;
@@ skipping 803 matching lines @@
     if (logfile != NULL)
         fclose(logfile);
     return(ret);
 }
 #else /* !SCHEMAS */
 int
 main(int argc ATTRIBUTE_UNUSED, char **argv ATTRIBUTE_UNUSED) {
     fprintf(stderr, "runsuite requires support for schemas and xpath in libxml2\n");
 }
 #endif