Update git submodules

* Update docs/submodules/releng from branch 'master'
  - Merge "jjb: daisy: Upload iso file as well as the bin file"
  - jjb: daisy: Upload iso file as well as the bin file

    To align to the convention, Daisy now also provides iso format
    artifacts for user to download instead of the bin format. So
    need to upload iso to GS.

    In future, the bin file can be eliminated to save storage space.

    Depends-On: I6ddfe8e291ea8f6d673bd82c4df310d63f61a130

    Change-Id: Ib97f93b043866174d5d63f122aa867b2af1c1424
    Signed-off-by: Zhijiang Hu <hu.zhijiang@zte.com.cn>

diff --git a/docs/submodules/releng b/docs/submodules/releng
index f6255c4..2ec02b9 160000 (submodule)
--- a/docs/submodules/releng
+++ b/docs/submodules/releng
@@ -1 +1 @@
-Subproject commit f6255c45367f39533b589a91ca351ad0bcfd0ac9
+Subproject commit 2ec02b9acd6bcdf251ef5ae1cb8a4a304aed1195