Update lib submodule

diff --git a/rpp-lib b/rpp-lib
index e4e591de881211ff8325716e902540e77623d2fd..3494981f36c5c8f569190aa5a82c72ee2377151b 160000 (submodule)
--- a/rpp-lib
+++ b/rpp-lib
@@ -1 +1 @@
-Subproject commit e4e591de881211ff8325716e902540e77623d2fd
+Subproject commit 3494981f36c5c8f569190aa5a82c72ee2377151b