sanitycheck: encode logs correctly

                    bl = os.path.join(p, "qemu.log")

                if os.path.exists(bl):

                    with open(bl, "r") as f:

                        log = f.read()

                        ansi_escape = re.compile(r'\x1b[^m]*m')

                        output = ansi_escape.sub('', str(log))

                        failure.text = (escape(output))

                    with open(bl, "rb") as f:

                        log = f.read().decode("utf-8")

                        failure.text = log

        result = ET.tostring(eleTestsuites)

        f = open(filename, 'wb')