l4: Add paging experiments in startup code for bootstrap.

diff --git a/l4 b/l4
index 6872a213ac58ef264825dc92aff484df59041065..b44ae30b529cdd0374c8590e34d4d398adaf8b03 160000 (submodule)
--- a/l4
+++ b/l4
@@ -1 +1 @@
-Subproject commit 6872a213ac58ef264825dc92aff484df59041065
+Subproject commit b44ae30b529cdd0374c8590e34d4d398adaf8b03