Wait for a specific keypress

src/freedombone-image-customise

     echo '            reboot' >> $rootdir/root/.bashrc
     echo '        fi' >> $rootdir/root/.bashrc
     echo '    else' >> $rootdir/root/.bashrc
-    echo '        read -n1 -r -p $"Installation failed. Press any key to continue..." key' >> $rootdir/root/.bashrc
+    echo '        key=' >> $rootdir/root/.bashrc
+    echo '        while [[ $key != "x" ]]; do' >> $rootdir/root/.bashrc
+    echo '            read -n1 -r -p "Press x to continue..." key' >> $rootdir/root/.bashrc
+    echo '        done' >> $rootdir/root/.bashrc
     echo '    fi' >> $rootdir/root/.bashrc
     echo '    exit' >> $rootdir/root/.bashrc
     echo 'else' >> $rootdir/root/.bashrc