nouveau: android: add space before PRIx64 macro

nouveau: android: add space before PRIx64 macro

Otherwise the android build fails with

   error : unable to find string literal operator ‘operator"" PRIx64’

There are several resources referring to the problem, which is related
to c++11, in our case used when building mesa for lollipop.

http://comments.gmane.org/gmane.comp.graphics.opensg.user/5883

I've not investigated all the semantics, some people even suggested a
bug in the gcc compiler,
I just saw the building error was solved with one little space for
lollipop and no side effect when c+11 not used.

v2: [Emil Velikov] add an alternative commit message from Mauro.

Cc: 11.0 <mesa-stable@lists.freedesktop.org>
Reviewed-by: Emil Velikov <emil.l.velikov@gmail.com>