include teesock, update test program

[rpi_small] / teesock

diff --git a/teesock b/teesock
new file mode 160000 (submodule)
index 0000000..7f2916d
--- /dev/null
+++ b/teesock
@@ -0,0 +1 @@
+Subproject commit 7f2916d1960ad00d156f1d354f9402def32c0848