Update git submodules

* Update docs/submodules/daisy from branch 'master'
  - ceilometer needs gnocchi from pike

    Change-Id: I793a31e42eb5dd9f9af34489c599624b8c83e11a
    Signed-off-by: Zhijiang Hu <hu.zhijiang@zte.com.cn>

diff --git a/docs/submodules/daisy b/docs/submodules/daisy
index 2ce15da..885fc9b 160000 (submodule)
--- a/docs/submodules/daisy
+++ b/docs/submodules/daisy
@@ -1 +1 @@
-Subproject commit 2ce15da683b2fbf9cdac71f49adb6f739442ed90
+Subproject commit 885fc9bb2ba45c46d8b3f4d18f2745e53295f66e