change elasticsearch text query to match query for compat with 1.1.0

Summary:
ElasticSearch silently removed the long-deprecated `text` query in favor of the `match` query.  `match` works just like `text`, so the fix is simple.

fixes T5507

Test Plan: see if the breakage is fixed

Reviewers: epriestley, #blessed_reviewers

Reviewed By: epriestley, #blessed_reviewers

Subscribers: WikiChad, epriestley, Korvin

Maniphest Tasks: T5507

Differential Revision: https://secure.phabricator.com/D9784

src/applications/search/engine/PhabricatorSearchEngineElastic.php

@@ -152,7 +152,7 @@ final class PhabricatorSearchEngineElastic extends PhabricatorSearchEngine {
         $should = array();
         foreach ($param as $val) {
           $should[] = array(
-            'text' => array(
+            'match' => array(
               "relationship.{$field}.phid" => array(
                 'query' => $val,
                 'type' => 'phrase',