Revert rP87c60abbd02d, apply D1772

Test Plan:
Apply SQL patch.
Visit /differential/.

Reviewers: epriestley

Reviewed By: epriestley

CC: aran, epriestley

Differential Revision: https://secure.phabricator.com/D1781

resources/sql/patches/113.lastreviewer.sql

@@ -0,0 +1,12 @@
+ALTER TABLE `phabricator_differential`.`differential_revision`
+  ADD `lastReviewerPHID` varchar(64) BINARY AFTER `authorPHID`;
+
+UPDATE `phabricator_differential`.`differential_revision`
+SET `lastReviewerPHID` = (
+  SELECT `authorPHID`
+  FROM `differential_comment`
+  WHERE `revisionID` = `differential_revision`.`id`
+  AND `action` IN ('accept', 'reject')
+  ORDER BY `id` DESC
+  LIMIT 1
+);