[PATCH v2] testsuites/samples/fileio - Increase of stack size

[Frank Kühndel]

I also created a ticket for RTEMS version 5 as requested by Joel and
Chris. It is #4144.

Yet, note that I have not tested whether the problem appears there, too.
The efforts to install and compile 5.1 just for this simple test are
prohibitive. Sorry for this. Maybe someone else who is working with 5.1
can check it.

Moreover, I cannot contribute to the discussion -Og versus -O0.

Greetings
Frank