[patch] Fix build error for tst-printf-bz18872 on arm/aarch64 and s390

[Paul Pluzhnikov]

On Wed, Oct 7, 2015 at 8:11 PM, Paul Pluzhnikov <ppluzhnikov@google.com> wrote:

>> Nothing in the patch or changelog says why this is conditional on
>> __x86_64__ and __i386__.

Oh, it's the "why" part. Ok, I'll add that.

Thanks,
-- 
Paul Pluzhnikov