fdo#77891 unconditionally disable console streams for WinXP

as the functions to check for a valid filehandle don't work according to
the documentation. Python in LO-Context is run from GUI anyway, and thus
won't have those hooked up.

Change-Id: I8bc048463b0dc1a25c1b6ba7422623dda110eddc
(cherry picked from commit 788228e4aec06501a0e73193ba85fcdeef7efb69)