Update git submodules

* Update docs/submodules/releng from branch 'master'
  - Merge "Enable daisy euphrates jobs of daily and functest"
  - Enable daisy euphrates jobs of daily and functest

    Change-Id: I8c0c088c5b6879033e1d369488b589271e741a68
    Signed-off-by: Alex Yang <yangyang1@zte.com.cn>

diff --git a/docs/submodules/releng b/docs/submodules/releng
index 5f70d3e..97ae2ba 160000 (submodule)
--- a/docs/submodules/releng
+++ b/docs/submodules/releng
@@ -1 +1 @@
-Subproject commit 5f70d3e9480e1fd1608b0e6a63482622e1bc1dbf
+Subproject commit 97ae2baff7af396ff2a90e7838fe0c50ef2dfce8