Update git submodules

* Update plugins/hooks from branch 'master'
  to c7d1e9528ff00b5458adda02376357b6a0f817d6
  - Merge branch 'stable-2.14'
    
    * stable-2.14:
      Add documentation to help with debugging hook problems
      Document behavior of plugin regarding configuration changes
    
    Change-Id: I959d6d73c27a5a5521a00fe360e29dffd26c51ef
    
  - Add documentation to help with debugging hook problems
    
    A common problem for users of the plugin is that they are not sure
    if their hooks are actually being executed, and what their output
    is.
    
    Such information is logged by the plugin, but only at debug level.
    
    Add a section in the documentation showing how to enable the logging.
    
    Change-Id: I6e040f958ce4503f5cc0468ebe09466914d4a7eb
    
  - Document behavior of plugin regarding configuration changes
    
    Change-Id: I6509349994fce8405086982ee0d58bd38292ad29
    
diff --git a/plugins/hooks b/plugins/hooks
index 4bad0fe..c7d1e95 160000
--- a/plugins/hooks
+++ b/plugins/hooks
@@ -1 +1 @@
-Subproject commit 4bad0fe13f9a75306d552cd57b1866e6dceb54ef
+Subproject commit c7d1e9528ff00b5458adda02376357b6a0f817d6