Update git submodules

* Update docs/submodules/moon from branch 'master'
  - Merge "Fix a bug in moon_manager_db"
  - Fix a bug in moon_manager_db

    Change-Id: Ib65a89dba04bc4c94913ee8573401fbb0a6f5c7b

diff --git a/docs/submodules/moon b/docs/submodules/moon
index 13fe63c..f9c21c3 160000 (submodule)
--- a/docs/submodules/moon
+++ b/docs/submodules/moon
@@ -1 +1 @@
-Subproject commit 13fe63cb3dd8b5916f48f75be107afb87f40ce96
+Subproject commit f9c21c3a0f37e92474500b8aa8b460678a6098f8