update submodules to release v0.8.2

tanhe123 · tanhe123 · commit a2512db960eb · 2017-04-05T16:59:57.000+08:00
diff --git a/frontend b/frontend
@@ -1 +1 @@
-Subproject commit af0d154b9a173fe3e1cbbcdff5fceeb9222138f1
+Subproject commit cef76656309df788b93c8aa662eba49d4681058a
