[PATCH] test: final named query test works regardless of Xapian FieldProcessor

[David Bremner]

Daniel Kahn Gillmor <dkg at fifthhorseman.net> writes:

> This test passes with older versions of Xapian as well, because
> neither query returns any results.
>
> This should resolve the travis build failure at
> https://travis-ci.org/notmuch/notmuch/builds/318571658
>
> Signed-off-by: Daniel Kahn Gillmor <dkg at fifthhorseman.net>

pushed to master.

d