[Bug libgcc/81415] termio ioctl returns incorrect value for some characters

[steven at pemberton dot nl]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81415

--- Comment #3 from Steven Pemberton <steven at pemberton dot nl> ---
$ gcc --version
gcc (Ubuntu 5.4.0-6ubuntu1~16.04.4) 5.4.0 20160609