add LANG=C to pacman -Syu too

CHANGELOG

@@ -9,6 +9,7 @@ Environment:
 - added archboot-fw-check.sh
 update:
 - removed Xorg plasma and gnome support
+- more robust desktop installation and startup routine
 setup:
 - added user management
 - added Swap file support

usr/lib/archboot/update/desktop.sh

@@ -39,7 +39,7 @@ _IGNORE=""
         done
     fi
     #shellcheck disable=SC2086
-    pacman -Syu ${_IGNORE} --noconfirm &>"${_LOG}"
+    LANG=C pacman -Syu ${_IGNORE} --noconfirm &>"${_LOG}"
     if [[ ! -e "/.full_system" ]]; then
         _cleanup
     fi
@@ -105,6 +105,7 @@ _prepare_graphic() {
     for i in dbus dbus-org.freedesktop.login1.service; do
         systemctl reload ${i}
     done
+    # start polkit, most desktop environments expect it running!
     systemctl restart polkit
 }