Update git submodules

* Update docs/submodules/osa.git from branch 'master'
  to eac8c88714237aed5446f1def9a1ca0412c80329
  - Make OSAs orphans in Sphinx terms

    OSAs are not included in built documentation directly but as a symlinked
    documents. This results in warning about not including source of the
    symlink in rendered docs: "WARNING: document isn't included in any
    toctree".

    Making them "orphans" suppresses this warning for both source advisories
    as well as symlinks. They are included in table of contents by a
    wildcard so in the end none will get lost.

    Issue-ID: SECCOM-264
    Change-Id: Ia2920c3d289c402c74de01d21818c67424664f14
    Signed-off-by: Pawel Wieczorek <p.wieczorek2@samsung.com>

diff --git a/docs/submodules/osa.git b/docs/submodules/osa.git
index ac262d0..eac8c88 160000 (submodule)
--- a/docs/submodules/osa.git
+++ b/docs/submodules/osa.git
@@ -1 +1 @@
-Subproject commit ac262d0846be8a8495258014e508bc495f252fe9
+Subproject commit eac8c88714237aed5446f1def9a1ca0412c80329