Update git submodules

* Update docs/submodules/so.git from branch 'master'
  to 351a7247cccc8550679a9ec7c04fdcc28e3e647a
  - Merge "Added git attributes to convert line endings to"
  - Added git attributes to convert line endings to

    Added git attributes to convert line endings to unix on checkout for
    .sh files

    Issue-ID: SO-2717
    Signed-off-by: Benjamin, Max (mb388a) <mb388a@att.com>
    Change-Id: I30cf53f6e89f447400ce51217ca4238b46f8fa23

diff --git a/docs/submodules/so.git b/docs/submodules/so.git
index 43fc1ee..351a724 160000 (submodule)
--- a/docs/submodules/so.git
+++ b/docs/submodules/so.git
@@ -1 +1 @@
-Subproject commit 43fc1ee27456a17668e5f3f424a0bc6b7973e6e8
+Subproject commit 351a7247cccc8550679a9ec7c04fdcc28e3e647a