Fix an issue with marking aborted buildables failed when more than one build is aborted

Summary: See <https://discourse.phabricator-community.org/t/upgrade-issue-2018-week-7-mid-february/1139>.

Test Plan: Used `bin/storage upgrade -f --apply ...` to re-apply the migration.

Differential Revision: https://secure.phabricator.com/D19116

resources/sql/autopatches/20180214.harbor.01.aborted.php

@@ -10,7 +10,8 @@ foreach (new LiskMigrationIterator($table) as $buildable) {
 
   $aborted = queryfx_one(
     $conn,
-    'SELECT * FROM %T WHERE buildablePHID = %s AND buildStatus = %s',
+    'SELECT * FROM %T WHERE buildablePHID = %s AND buildStatus = %s
+      LIMIT 1',
     id(new HarbormasterBuild())->getTableName(),
     $buildable->getPHID(),
     'aborted');