Update git submodules

* Update plugins/codemirror-editor from branch 'master'
  to 0ffcc1c5865bbfecb811d8631e010251fae04317
  - Add missing top-level LICENSE file
    
    This repo is part of the Gerrit Code Review umbrella, which is
    maintained by Google and defaults to the Apache license. All
    contributions from non-Googlers are to files that already had the Apache
    license header on a per-file level.
    
    Change-Id: I5b50407561691c3d0f0308e569b6e646a173ab29
    
diff --git a/plugins/codemirror-editor b/plugins/codemirror-editor
index c4cf42b..0ffcc1c 160000
--- a/plugins/codemirror-editor
+++ b/plugins/codemirror-editor
@@ -1 +1 @@
-Subproject commit c4cf42b96a049a0fb854bcbcb85b56a82d91a009
+Subproject commit 0ffcc1c5865bbfecb811d8631e010251fae04317