Update git submodules

* Update docs/submodules/so.git from branch 'master'
  to 7edfbac402214a59f6a305e4c6f6706dbcc6f169
  - Merge "Replace str literal for const, replace type spec"
  - Replace str literal for const, replace type spec

    Replace string literal with const,replace type specification

    Issue-ID: SO-1490

    Change-Id: Ie37ebd3f15ded40579777ffead04f7d2c3a65a43
    Signed-off-by: Sindhuri.A <arcot.sindhuri@huawei.com>

diff --git a/docs/submodules/so.git b/docs/submodules/so.git
index 23dcea1..7edfbac 160000 (submodule)
--- a/docs/submodules/so.git
+++ b/docs/submodules/so.git
@@ -1 +1 @@
-Subproject commit 23dcea150a14c62e055177dd0dc0a8901273dd68
+Subproject commit 7edfbac402214a59f6a305e4c6f6706dbcc6f169