Bionic library requires explicit include for data types used in ioctl
call. This fix following build error with bionic:
target C: btmon <= external/bluetooth/bluez/monitor/display.c
external/bluetooth/bluez/monitor/display.c: In function 'num_columns':
external/bluetooth/bluez/monitor/display.c:59:18: error: storage size
of 'ws' isn't known
#include <sys/wait.h>
#include <sys/prctl.h>
#include <sys/ioctl.h>
+#include <termios.h>
#include "display.h"