Update vmlinux-to-bzImage.sh

Kernel 3 bromolow forget

files/board/arpl/overlayfs/opt/arpl/vmlinux-to-bzImage.sh

@@ -41,8 +41,9 @@ size_le () {
 SCRIPT_DIR=`dirname $0`
 VMLINUX_MOD=${1}
 ZIMAGE_MOD=${2}
-if [ ${KVER:0:1} -eq 4 ]; then
-  # Kernel version 4.x
+KVER_MAJOR=${KVER:0:1}
+if [ $KVER_MAJOR -eq 4 ] || [ $KVER_MAJOR -eq 3 ]; then
+  # Kernel version 4.x or 3.x (bromolow)
   #zImage_head           16494
   #payload(
   #  vmlinux.bin         x