make overlay scripts use kernel modules and executables relative to pwd in preparison for 9p

rootfs_overlay/dep.sh

@@ -3,8 +3,8 @@ set -e
 f=/sys/kernel/debug/lkmc_dep
 f2=/sys/kernel/debug/lkmc_dep2
 
-insmod /dep.ko
-insmod /dep2.ko
+insmod dep.ko
+insmod dep2.ko
 
 # Initial value.
 [ "$(cat "$f")" = 0 ]
@@ -20,8 +20,8 @@ printf 2 > "$f"
 # sysfs shows us that the module has dependants.
 [ "$(cat /sys/module/dep/refcnt)" = 1 ]
 [ "$(ls /sys/module/dep/holders)" = dep2 ]
-rmmod /dep2.ko
+rmmod dep2.ko
 [ "$(cat /sys/module/dep/refcnt)" = 0 ]
 [ -z "$(ls /sys/module/dep/holders)" ]
 
-rmmod /dep.ko
+rmmod dep.ko