fix typo in comment

src/scripts/customize_rootfs.sh

 #!/bin/sh
 
 # Copyright (c) 2009 The Chromium OS Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 # Customizes the root file system of a chromium-based os.
 # NOTE: This script should be called by build_image.sh. Do not run this
 # on your own unless you know what you are doing.
 
@@ skipping 95 matching lines @@
 
 # Remove unneeded fonts.
 UNNEEDED_FONTS_TYPES=$(ls -d /usr/share/fonts/* | grep -v truetype)
 UNNEEDED_TRUETYPE_FONTS=$(ls -d /usr/share/fonts/truetype/* | grep -v ttf-droid)
 for i in $UNNEEDED_FONTS_TYPES $UNNEEDED_TRUETYPE_FONTS; do
   rm -rf "$i"
 done
 
 # The udev daemon takes a long time to start up and settle so we defer it until
 # after X11 has been started. In order to be able to mount the root file system
-# and start X we pre-propulate some devices. These are copied into /dev by the
+# and start X we pre-populate some devices. These are copied into /dev by the
 # chromeos_startup script.
 UDEV_DEVICES=/lib/udev/devices
 mkdir "$UDEV_DEVICES"/dri
 mkdir "$UDEV_DEVICES"/input
 mknod --mode=0600 "$UDEV_DEVICES"/initctl p
 mknod --mode=0660 "$UDEV_DEVICES"/tty0 c 4 0
 mknod --mode=0660 "$UDEV_DEVICES"/tty1 c 4 1
 mknod --mode=0660 "$UDEV_DEVICES"/tty2 c 4 2
 mknod --mode=0666 "$UDEV_DEVICES"/tty  c 5 0
 mknod --mode=0666 "$UDEV_DEVICES"/ptmx c 5 2
@@ skipping 67 matching lines @@
 cat <<EOF > /etc/network/interfaces
 auto lo
 iface lo inet loopback
 EOF
 
 cat <<EOF > /etc/resolv.conf
 # Use the connman dns proxy.
 nameserver 127.0.0.1
 EOF
 chmod a-wx /etc/resolv.conf