Update git submodules

* Update docs/submodules/ccsdk/distribution.git from branch 'master'
  to e7ff6b51d92450641f017bccd34496a28229129f
  - Update release notes

    Update release notes for El Alto release

    Change-Id: I2c724fd70990ef3aac21c5efdc656c0bb628ae03
    Issue-ID: CCSDK-1701
    Signed-off-by: Timoney, Dan (dt5972) <dtimoney@att.com>

diff --git a/docs/submodules/ccsdk/distribution.git b/docs/submodules/ccsdk/distribution.git
index 3948e2a..e7ff6b5 160000 (submodule)
--- a/docs/submodules/ccsdk/distribution.git
+++ b/docs/submodules/ccsdk/distribution.git
@@ -1 +1 @@
-Subproject commit 3948e2a63a58dbc3e1fec980971a1756fafb2388
+Subproject commit e7ff6b51d92450641f017bccd34496a28229129f