Properly name database in patch list

Summary:
Blames to D3659.
It's not that old (< 1 day) to fix it properly (add patch for dropping xhpast DB).

Test Plan:
  $ arc unit src/applications/calendar/storage/__tests__/PhabricatorCalendarHolidayTestCase.php

Reviewers: btrahan, epriestley

Reviewed By: btrahan

CC: aran, Korvin

Differential Revision: https://secure.phabricator.com/D3670

src/infrastructure/storage/patch/PhabricatorBuiltinPatchList.php

@@ -167,9 +167,9 @@ final class PhabricatorBuiltinPatchList extends PhabricatorSQLPatchList {
         'type'    => 'db',
         'name'    => 'ponder',
       ),
-      'db.xhpast' => array(
+      'db.xhprof' => array(
         'type'    => 'db',
-        'name'    => 'xhpast',
+        'name'    => 'xhprof',
       ),
       '0000.legacy.sql' => array(
         'type'    => 'sql',