Get rid of duplicate const declaration specifier warning in tst-resolv-qtypes.c.

[Paul Eggert]

H.J. Lu wrote:
>> Why not:
>>
>> static const char domain[] = "www.example.com";
>>
>> instead, before you backport?  It's simpler and less confusing.

> If we want to do this, it should go into master branch first and
> backport it 2.26 branch before putting in 2.25 branch.    Should
> we do it?

Yes, that's the idea.