Add an #include of sys/ioctl.h to pick up a lot of the constants supported
in the previous patch.

This closes (again!) SF patch #410267.
diff --git a/Modules/termios.c b/Modules/termios.c
index 054d259..0bce7d3 100644
--- a/Modules/termios.c
+++ b/Modules/termios.c
@@ -5,6 +5,7 @@
 #define PyInit_termios inittermios
 
 #include <termios.h>
+#include <sys/ioctl.h>
 
 static char termios__doc__[] = "\
 This module provides an interface to the Posix calls for tty I/O control.\n\