Apply sprite sheet changes to Phabricator

Summary: Basically a one line change, plus a regen. This should be the last full-rewrite these things get since they'll stop fully rehashing all the time now.

Test Plan: See D5964.

Reviewers: chad, btrahan

Reviewed By: chad

CC: aran

Differential Revision: https://secure.phabricator.com/D5965

scripts/celerity/generate_sprites.php

@@ -51,6 +51,9 @@ if ($err) {
 }
 
 foreach ($sheets as $name => $sheet) {
+
+  $sheet->setBasePath($root);
+
   $manifest_path = $root.'/resources/sprite/manifest/'.$name.'.json';
   if (!$args->getArg('force')) {
     if (Filesystem::pathExists($manifest_path)) {