Comment 3 for bug 1236317

it already should handle this:

# If xrdb (from xbase-clients) is installed, merge system-wide X resources.
# Then merge the user's X resources, if the options file is so configured.
if [ -d "$SYSRESOURCES" ] && type xrdb >/dev/null 2>&1; then
  RESOURCEFILES=$(run-parts --list $SYSRESOURCES)
  if [ -n "$RESOURCEFILES" ]; then
    for RESOURCEFILE in $RESOURCEFILES; do
      xrdb -merge $RESOURCEFILE
    done
  fi
fi