[PATCH] Fix gdb1476.exp on s390*

[Andrew Cagney]

> Andrew Cagney wrote:
> 
> 
>>> Try the attached.
> 
> 
> Works fine on s390-ibm-linux and s390x-ibm-linux, no test suite
> regression, and fixes the gdb1476 NULL pointer test.
> 
> Thanks for taking care of this!

committed to mainline and 6.1 branch

Andrew