Remove bashisms from scripts

Scripts must be able to run in chrooted environment without
the `bash`. Remove call of internal `shopt` command and fix shebang.

Fixes T4475

Signed-off-by: Denis Pynkin <denis.pynkin@collabora.com>

Differential Revision: https://phabricator.apertis.org/D7426

scripts/add-xdg-user-metadata.chroot

-#!/bin/bash
+#!/bin/sh
 
 set -e
-shopt -s dotglob > /dev/null 2>&1
 
 # Hackish: Add user XDG metadata BUG: #1157
 echo "I: Adding XDG user metadata."
@@ -10,4 +9,3 @@ mkdir -p /etc/skel/.local/{bin,etc,include,lib,libexec,share}
 
 mkdir -p /root/{.config,.cache,.dbus}
 mkdir -p /root/.local/{bin,etc,include,lib,libexec,share}
-shopt -u

scripts/ostree-prepare.sh

-#!/bin/bash
+#!/bin/sh
 
 set -e
 

scripts/setup_image_version.chroot

-#!/bin/bash
+#!/bin/sh
 
 set -e
-shopt -s dotglob
 
 distro=$1
 rel=$2
@@ -9,5 +8,3 @@ timestamp=$3
 vendor=$4
 
 echo "${distro} ${rel} ${timestamp} ${vendor}" > /etc/image_version
-
-shopt -u

scripts/setup_sysroot.chroot

-#!/bin/bash
+#!/bin/sh
 
 set -e
-shopt -s dotglob
 
 echo "I: create sysroot directory"
 install -d -m 0755 /home/sysroot
 chown user.user /home/sysroot
 echo "I: link /opt/sysroot to sysroot directory"
 ln -sf ../home/sysroot /opt/sysroot
-
-shopt -u

scripts/setup_user.chroot

-#!/bin/bash
+#!/bin/sh
 
 set -e
-shopt -s dotglob
 
 echo "I: create user"
 adduser --gecos User --disabled-login user
 
 echo "I: set user password"
 echo "user:user" | chpasswd
-
-shopt -u