bitbake: cooker.py: Catch when stdout doesn't have a file descriptor

bitbake: cooker.py: Catch when stdout doesn't have a file descriptor

Currently, there is a check to remove the TOSTOP attribute from
a tty to avoid hangs. It assumes that sys.stdout will have a
file descriptor and this is not always true, some IO classes
will throw exceptions when trying to get its file descriptor.

This will add a check for such cases and avoid throwing an
exception.

[YOCTO #10162]

(Bitbake rev: cb4f8f6efa28ef2b13bc738a0118b876baa15b3e)

Signed-off-by: Mariano Lopez <mariano.lopez@linux.intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>