Fix strange bug for russian language search results

Summary:
I created this review to get an answer...
It should not be taken as a real fix.

I noticed that phabricator return corrupted search results for some russian queries (without this patch).
See screenshot:

But I can't reproduce this bug on https://secure.phabricator.com/
This search query causes problems only for my phabricator instance.

More than that, I didn't find any php.ini-settings that can resolve this problem.
It's look like your phabricator instance use /u-modifier by default.

But how is it possible?

Test Plan: NONE

Reviewers: epriestley, Blessed Reviewers

Reviewed By: epriestley, Blessed Reviewers

Subscribers: epriestley, Korvin

Differential Revision: https://secure.phabricator.com/D8859