Add --no-install-recommends when we install most of our components.

src/scripts/customize_rootfs.sh

 #!/bin/bash
 
 # 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.
 
 # Script to customize the root file system after packages have been installed.
 #
 # 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 130 matching lines @@
 TMP_STATIC=$(mktemp -d)
 sudo cp -r "${SRC_ROOT}/rootfs_static_data/common/." "$TMP_STATIC"
 # TODO: Copy additional target-platform-specific subdirectories.
 sudo chmod -R a+rX "$TMP_STATIC/."
 sudo cp -r "$TMP_STATIC/." "$ROOT_FS_DIR"
 sudo rm -rf "$TMP_STATIC"
 
 # Fix issue where alsa-base (dependency of alsa-utils) is messing up our sound
 # drivers. The stock modprobe settings worked fine.
 # TODO: Revisit when we have decided on how sound will work on chromeos.
-sudo rm "${ROOT_FS_DIR}/etc/modprobe.d/alsa-base.conf"
+! sudo rm "${ROOT_FS_DIR}/etc/modprobe.d/alsa-base.conf"
 
 # Remove unneeded fonts.
 sudo rm -rf "${ROOT_FS_DIR}/usr/share/fonts/X11"
 
 # 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-populate some devices. These are copied into /dev by the
 # chromeos_startup script.
 # TODO: There is no good reason to put this in /lib/udev/devices. Move it.
 # TODO: Hopefully some of this can be taken care of by devtmpfs.
@@ skipping 84 matching lines @@
 cat <<EOF | sudo dd of="${ROOT_FS_DIR}/etc/network/interfaces"
 auto lo
 iface lo inet loopback
 EOF
 
 cat <<EOF | sudo dd of="${ROOT_FS_DIR}/etc/resolv.conf"
 # Use the connman dns proxy.
 nameserver 127.0.0.1
 EOF
 sudo chmod a-wx "${ROOT_FS_DIR}/etc/resolv.conf"