Set initial keyboard map for mesh client

src/freedombone-image-customise

 # a new identity at every shutdown/boot
 AMNESIC='no'
 
+# defines the initial keyboard layout
+KEYBOARD_MAP='gb'
+
 enable_eatmydata_override() {
     chroot $rootdir apt-get install --no-install-recommends -y eatmydata
     if [ -x $rootdir/usr/bin/eatmydata ] && \
     START_DESKTOP=$rootdir/home/$MY_USERNAME/mesh-desktop.sh
 	FIRST_BOOT=/home/$MY_USERNAME/.first_boot
     echo '#!/bin/bash' > $START_DESKTOP
+    echo "setxkbmap ${KEYBOARD_MAP}" > $START_DESKTOP
     echo 'dconf write /org/mate/caja/desktop/volumes-visible false' >> $START_DESKTOP
     echo 'dconf write /org/mate/caja/desktop/computer-icon-visible false' >> $START_DESKTOP
     echo 'dconf write /org/mate/caja/desktop/home-icon-visible false' >> $START_DESKTOP