Update git submodules

* Update docs/submodules/moon from branch 'master'
  - Merge "Fix some tests"
  - Fix some tests

    Change-Id: I4d670aebd04d5cc0867f66e5e261fffcb97ea874

diff --git a/docs/submodules/moon b/docs/submodules/moon
index 37f6844..646e77e 160000 (submodule)
--- a/docs/submodules/moon
+++ b/docs/submodules/moon
@@ -1 +1 @@
-Subproject commit 37f68445c2490a6e9b07626fefa1dc7d9d6cb312
+Subproject commit 646e77e86cd220f4be02110b16ce802d85c35b27