Update git submodules

* Update docs/submodules/daisy from branch 'stable/euphrates'
  - Create iso file during build

    Change-Id: I6ddfe8e291ea8f6d673bd82c4df310d63f61a130
    Signed-off-by: Zhijiang Hu <hu.zhijiang@zte.com.cn>
    (cherry picked from commit 47d0995307685d7d3903fd909e6b1e7ad4311649)

diff --git a/docs/submodules/daisy b/docs/submodules/daisy
index b55bdb9..e45eda9 160000 (submodule)
--- a/docs/submodules/daisy
+++ b/docs/submodules/daisy
@@ -1 +1 @@
-Subproject commit b55bdb9aa83c679f8ed9315d02ddf567370c6bb3
+Subproject commit e45eda9887381c70afc26aa45b0cf9ce16bf0398