Update git submodules

* Update docs/submodules/dovetail from branch 'master'
  - Added a license metadata line to specify Apache-2.0

    Change-Id: Ic5c3c3e2bbc2cff54f291fcd77bf9b5741f9f606
    Signed-off-by: rpaik <rpaik@linuxfoundation.org>

diff --git a/docs/submodules/dovetail b/docs/submodules/dovetail
index f88b298..47d4daa 160000 (submodule)
--- a/docs/submodules/dovetail
+++ b/docs/submodules/dovetail
@@ -1 +1 @@
-Subproject commit f88b298c17a3dac9e6b2882d3f10f274572fc29d
+Subproject commit 47d4daaa3df5c11462d698ff50c4dd2fe086d8d7