Add aaf/sms.git submodule

Change-Id: Ic773345f30f6b80a2e67ff0d5bd7e140614424a1
Issue-ID: DOC-266
Signed-off-by: Rich Bennett <rb2745@att.com>
diff --git a/.gitmodules b/.gitmodules
index 28ad236..ec64ed9 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -323,3 +323,8 @@
 	url = ../integration/devtool
 	branch = .
 	ignore = dirty
+[submodule "docs/submodules/aaf/sms.git"]
+	path = docs/submodules/aaf/sms.git
+	url = ../aaf/sms
+	branch = .
+	ignore = dirty