install /etc/mender/script/version file

This file needs to be present for state-scripts to work as the format
version will be validated using the information provided in this file
and the version in the Mender Artifact.

"3" means that it will only accept state-scripts created using
Mender Artifact version 3.

Changelog: Title

Signed-off-by: Mirza Krak <mirza.krak@northern.tech>

convert-stage-4.sh

@@ -56,6 +56,8 @@ server_cert=
 tenant_token=
 # Mender tenant token.
 mender_tenant_token="dummy"
+# Mender state-script format version
+mender_state_scripts_version="3"
 
 declare -a mender_disk_mappings
 
@@ -130,6 +132,9 @@ install_files() {
   sudo install -d -m 755 ${data_dir}/${dataconfdir}
   sudo install -d -m 755 ${data_dir}/${databootdir}
 
+  sudo install -d -m 755 ${primary_dir}/${sysconfdir}/scripts/
+  echo -n "${mender_state_scripts_version}" | sudo tee ${primary_dir}/${sysconfdir}/scripts/version
+
   sudo install -m 0444 ${mender_dir}/device_type ${data_dir}/${dataconfdir}
   sudo install -m 0644 ${mender_dir}/fw_env.config ${data_dir}/${databootdir}