private void appendShift(int shift) {
        for (int i = 0; i < shift; i++) {
            sb.append("\t");
        }
    }
trans to xml text when parse binary xml file.

@author dongliu
replugin-host-library/replugin-host-lib/src/main/java/com/qihoo360/replugin/ext/parser/parser/XmlTranslator.java