Update git submodules

* Update docs/submodules/daisy from branch 'master'
  - Merge "Mock sleep() to accelerate the unit test"
  - Mock sleep() to accelerate the unit test

    Change-Id: I664ba714ab4094754fa3d71587da8536555a02ce
    Signed-off-by: Alex Yang <yangyang1@zte.com.cn>

diff --git a/docs/submodules/daisy b/docs/submodules/daisy
index efc34c4..164ffc1 160000 (submodule)
--- a/docs/submodules/daisy
+++ b/docs/submodules/daisy
@@ -1 +1 @@
-Subproject commit efc34c487858d05e4ae92e90a931497548b6bec7
+Subproject commit 164ffc1780a6ffd2634533849f67ed640fb0745b