Update lib to the version with the new arm compiler

diff --git a/rpp/lib b/rpp/lib
index 8777b981152977f43b8b357bd15f4e1f337f4cb1..ca54af8b73a6d9ebdc08121d11bb8dd77fad7516 160000 (submodule)
--- a/rpp/lib
+++ b/rpp/lib
@@ -1 +1 @@
-Subproject commit 8777b981152977f43b8b357bd15f4e1f337f4cb1
+Subproject commit ca54af8b73a6d9ebdc08121d11bb8dd77fad7516