initrdscripts: fix udevd in the live boot init scripts

udevd moved location and isn't in $PATH anymore, so use an absolute path to
start it.

The control socket path moved too, so mkdir the directory it's in.

Mounts the new devtmpfs on /dev device tree.

(From OE-Core rev: 75f28875bcae2f91437d89d1ad97df29226e3303)

Signed-off-by: Ross Burton <ross.burton@intel.com>
Signed-off-by: Alexandru Damian <alexandru.damian@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/recipes-core/initrdscripts/files/init-live.sh

@@ -14,12 +14,14 @@ early_setup() {
     mkdir -p /sys
     mount -t proc proc /proc
     mount -t sysfs sysfs /sys
+    mount -t devtmpfs none /dev
 
     # support modular kernel
     modprobe isofs 2> /dev/null
 
     mkdir -p /run
-    udevd --daemon
+    mkdir -p /var/run
+    /lib/udev/udevd --daemon
     udevadm trigger --action=add
 }