Update git submodules

* Update docs/submodules/daisy from branch 'master'
  - Merge "Add unit test file test_libvirt_utils.py"
  - Add unit test file test_libvirt_utils.py

    Add the unit test file test_libvirt_utils.py

    Change-Id: Id5c44bd3683183367439486fbea8dba03ccb8bb7
    Signed-off-by: zhongjun <zhong.jun@zte.com.cn>

diff --git a/docs/submodules/daisy b/docs/submodules/daisy
index 7fb4a64..efc34c4 160000 (submodule)
--- a/docs/submodules/daisy
+++ b/docs/submodules/daisy
@@ -1 +1 @@
-Subproject commit 7fb4a641b9fd176dcad36d881bf5e11035392020
+Subproject commit efc34c487858d05e4ae92e90a931497548b6bec7