Update git submodules

* Update docs/submodules/daisy from branch 'master'
  - Add rpm based installation doc

    Change-Id: I50d5750e985b258cef7874c88902b8fae0539e25
    Signed-off-by: Zhijiang Hu <hu.zhijiang@zte.com.cn>

diff --git a/docs/submodules/daisy b/docs/submodules/daisy
index 4645bc8..2cf7f09 160000 (submodule)
--- a/docs/submodules/daisy
+++ b/docs/submodules/daisy
@@ -1 +1 @@
-Subproject commit 4645bc8eeec989a29731bcad848307f6587b34d8
+Subproject commit 2cf7f098048ef0c11eb1321747b600230a495c88