Fix build break on factory install kernel

BUG=chrome-os-partner:6384
TEST=it can netboot

Change-Id: I5bc3a64f2a70b6740791a68e25cb44536236c41b
Reviewed-on: http://gerrit.chromium.org/gerrit/5538
Reviewed-by: Hung-Te Lin <hungte@chromium.org>
Tested-by: Nick Sanders <nsanders@chromium.org>
diff --git a/make_netboot.sh b/make_netboot.sh
index 1627567..d795c42 100755
--- a/make_netboot.sh
+++ b/make_netboot.sh
@@ -66,10 +66,6 @@
 sudo rm -rf netboot
 mkdir -p netboot
 
-# Get netboot kernel.
-echo "Generating netboot kernel vmlinux.uimg"
-cp "${SYSROOT}/boot/vmlinux.uimg" "netboot"
-
 # Get netboot firmware.
 # TODO(nsanders): Set default IP here when userspace
 # env modification is available.
@@ -119,6 +115,11 @@
 sudo mount -o loop part_1 s
 echo "Mount install shim rootfs (partition 3)"
 
+# Get netboot kernel.
+echo "Generating netboot kernel vmlinux.uimg"
+cp "r/boot/vmlinux.uimg" "netboot"
+
+echo "Add lsb-factory"
 # Copy factory config file.
 # TODO(nsanders): switch this to u-boot env var config.
 LSB_FACTORY_DIR="mnt/stateful_partition/dev_image/etc"