Update rpp-lib

Add memory barriers and volatile qualifiers to jump code.

diff --git a/rpp-lib b/rpp-lib
index 9e91a543b9873e035f5216e84baae108b8b7b0e4..d236e927c4261adb466dac1384cb67e034b67c8b 160000 (submodule)
--- a/rpp-lib
+++ b/rpp-lib
@@ -1 +1 @@
-Subproject commit 9e91a543b9873e035f5216e84baae108b8b7b0e4
+Subproject commit d236e927c4261adb466dac1384cb67e034b67c8b