[PATCH] posix: Fix system error return value [BZ #25715]

[Adhemerval Zanella]

On 24/03/2020 11:05, Florian Weimer wrote:
> * Stefan Liebler via Libc-alpha:
> 
>> I've got two test fails as shown below on my Fedora 31/30 (s390x, 
>> x86_64) machines. I assume the error-messages differs depending on the 
>> used shell?
> 
> Looks like it.  It may be possible to turn this test into a container
> test, so that the minimal shell implementation from
> support/shell-container.c is used, which delivers consistent behavior.
> 

Indeed it depends on how the shell handles the arguments and the message
output it shows.  I will change to use be container test.