Adjust with changes in libxml2 upgrade

#include <android/font.h>

#include <android/font_matcher.h>

#include <android/system_fonts.h>

#include <memory>

#include <string>

#include <vector>

#include <errno.h>

#include <fcntl.h>

#include <libxml/tree.h>

#include <log/log.h>

#include <sys/stat.h>

#include <unistd.h>

#include <hwui/MinikinSkia.h>

#include <libxml/parser.h>

#include <log/log.h>

#include <minikin/FontCollection.h>

#include <minikin/LocaleList.h>

#include <minikin/SystemFonts.h>

#include <sys/stat.h>

#include <unistd.h>

#include <memory>

#include <string>

#include <vector>

struct XmlCharDeleter {

    void operator()(xmlChar* b) { xmlFree(b); }