fiasco: bootstrap: Fix linker script by removing segments description.

diff --git a/l4 b/l4
index 1cfb82633daba486807c0c89d0874b37d81a675c..7858e3576f619e822d5478fdf291e7a81d793d5a 160000 (submodule)
--- a/l4
+++ b/l4
@@ -1 +1 @@
-Subproject commit 1cfb82633daba486807c0c89d0874b37d81a675c
+Subproject commit 7858e3576f619e822d5478fdf291e7a81d793d5a