Update lib submodule

diff --git a/doc/test-sw b/doc/test-sw
index df6f2a3cd08b267c057ede92e4be154dbbf1a3d6..dfa3d6784ba1f7fcbcaae78055e94411305add9d 160000 (submodule)
--- a/doc/test-sw
+++ b/doc/test-sw
@@ -1 +1 @@
-Subproject commit df6f2a3cd08b267c057ede92e4be154dbbf1a3d6
+Subproject commit dfa3d6784ba1f7fcbcaae78055e94411305add9d