perf tools: fix missing winsize definition

In Android, struct winsize is not defined in the headers already
included in help.c. This leads to a compile error.

Including termios.h fixes the compilation error since it defines struct winsize.

Signed-off-by: Irina Tirdea <irina.tirdea@intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Namhyung Kim <namhyung.kim@lge.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Steven Rostedt <rostedt@goodmis.org>
Link: http://lkml.kernel.org/r/1347065004-15306-7-git-send-email-irina.tirdea@intel.com


Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>