Fix string/tst-xbzero-opt if build with gcc head.

[Stefan Liebler]

On 07/16/2018 02:36 PM, Zack Weinberg wrote:
> On Mon, Jul 16, 2018 at 7:05 AM, Stefan Liebler <stli@linux.ibm.com> wrote:
>> On 07/12/2018 06:42 PM, Zack Weinberg wrote:
>>> I would prefer us to find some kind of construct that
>>> actually does make externally-visible side effects depend on the
>>> contents of 'buf' in terms of the C abstract machine.
>>>
>>
>> Okay. Then here is a new version of the patch without the empty asm.
>> If build with GCC head on s390x, setup_no_clear is now filling the buffer
>> and setup_ordinary_clear is just a tail call to setup_no_clear (same
>> behaviour as before).
> 
> Yes, this change is OK.
> 
> zw
> 

Okay. Thank you.
Shall I commit this test-fix before or after the release?

Bye.
Stefan