Update git submodules

* Update docs/submodules/dovetail from branch 'stable/fraser'
  - Align testcase formats and complete volume testcase descriptions.

    Change-Id: Ie7497f6e5ef79726d8cbbcd9f05bffa2aac6c8b8
    Signed-off-by: louie.long <longyu805@163.com>
    (cherry picked from commit 60f1c35c294d5d94a862db348315f8f3b9f870ba)

diff --git a/docs/submodules/dovetail b/docs/submodules/dovetail
index 6ab9389..01aecb7 160000 (submodule)
--- a/docs/submodules/dovetail
+++ b/docs/submodules/dovetail
@@ -1 +1 @@
-Subproject commit 6ab9389c04ce8b73e089b765c42722b25314d9e6
+Subproject commit 01aecb7063ca10bb68a454bf3f324ea1f41b958f