Update git submodules

Update git submodules

* Update docs/submodules/daisy from branch 'master'
  - Merge "add the argument WORKDIR in daisy-img-modify.sh"
  - add the argument WORKDIR in daisy-img-modify.sh

    the daisy install tmp workdir can be configurated as an input
    argument in deploy.sh,and it also should be used in subshell
    daisy-img-modify.sh,so add the input argument -w workdir
    in daisy-img-modify.sh.

    1.add an input argument -w workdir in daisy-img-modify.sh.
    2.modify the WORKDIR default value to /tmp/workdir/daisy.
    3.code refactor to put the centos7.qcow2 file clean statement
    from the deploy.sh to daisy-img-modify.sh.

    Change-Id: Id375a15ad2839c209329e644c5e032d044604e7d
    Signed-off-by: zhongjun <zhong.jun@zte.com.cn>