[FIX] point_of_sale: update POSBox image creation script

- ngrok download URL has changed
- default kernel for raspbian image has changed and needs to match
- remove pre-existing git checkout to avoid conflicting
- wait a few seconds after setting up loop dev with kpartx to access image
  contents - sometimes required to let the device appear in /dev

addons/point_of_sale/tools/posbox/posbox_create_image.sh

@@ -28,6 +28,7 @@ fi
 cp -a *raspbian*.img posbox.img
 
 CLONE_DIR="${OVERWRITE_FILES_BEFORE_INIT_DIR}/home/pi/odoo"
+rm -rf "${CLONE_DIR}"
 mkdir "${CLONE_DIR}"
 git clone -b 8.0 --no-checkout --depth 1 https://github.com/odoo/odoo.git "${CLONE_DIR}"
 cd "${CLONE_DIR}"
@@ -44,7 +45,7 @@ cd "${__dir}"
 USR_BIN="${OVERWRITE_FILES_BEFORE_INIT_DIR}/usr/bin/"
 mkdir -p "${USR_BIN}"
 cd "/tmp"
-curl 'https://dl.ngrok.com/ngrok_2.0.19_linux_arm.zip' > ngrok.zip
+curl 'https://bin.equinox.io/c/4VmDzA7iaHb/ngrok-stable-linux-arm.zip' > ngrok.zip
 unzip ngrok.zip
 rm ngrok.zip
 cd "${__dir}"
@@ -68,6 +69,7 @@ START_OF_ROOT_PARTITION=$(fdisk -l posbox.img | tail -n 1 | awk '{print $2}')
 
 LOOP_MAPPER_PATH=$(kpartx -av posbox.img | tail -n 1 | cut -d ' ' -f 3)
 LOOP_MAPPER_PATH="/dev/mapper/${LOOP_MAPPER_PATH}"
+sleep 5
 
 # resize filesystem
 e2fsck -f "${LOOP_MAPPER_PATH}" # resize2fs requires clean fs

addons/point_of_sale/tools/posbox/posbox_download_images.sh

@@ -2,4 +2,4 @@
 
 wget 'https://downloads.raspberrypi.org/raspbian_lite_latest' -O raspbian.img.zip
 unzip raspbian.img.zip
-wget 'https://github.com/dhruvvyas90/qemu-rpi-kernel/raw/master/kernel-qemu-4.1.13-jessie' -O kernel-qemu
+wget 'https://github.com/dhruvvyas90/qemu-rpi-kernel/raw/master/kernel-qemu-4.4.13-jessie' -O kernel-qemu