Update git submodules

* Update plugins/hooks from branch 'master'
  - HookTask: Reduce amount of INFO logging emitted when running hooks
    
    Reduce the log level of the hook's exit code and output to debug.
    
    Change-Id: I80b6569696407296843eb4ae1d85e53301511d97
    
diff --git a/plugins/hooks b/plugins/hooks
index 7156fc2..a329746 160000
--- a/plugins/hooks
+++ b/plugins/hooks
@@ -1 +1 @@
-Subproject commit 7156fc2b350307fd8212591e29eb6b4662f9d17d
+Subproject commit a32974634954aa904acc00644bb0beb58b1ea934