Create a method to push an image to a live running Chromium OS machine

Create a method to push an image to a live running Chromium OS machine provided you have root ssh access with a local private key (which is the case for test builds).  Updates the running instance and reboots it.

[sosa, 2009-12-23 00:12:31]

Looks good to me.  You may want to add the pkill -f to the end of this script
(as you have in start_dev_server).  It seems like if the dev server wasn't
running before this script was run, it shouldn't be left running at the end.

On a side note:  I really like the configurability of this script.

[petkov, 2009-12-23 02:00:38]

A few comments but nothing critical -- feel free to submit as-is if you like.

http://codereview.chromium.org/512003/diff/7001/4002
File src/scripts/image_to_live.sh (right):

http://codereview.chromium.org/512003/diff/7001/4002#newcode7
src/scripts/image_to_live.sh:7: # Script to convert the output of build_image.sh
to a usb image.
Please change description.

http://codereview.chromium.org/512003/diff/7001/4002#newcode60
src/scripts/image_to_live.sh:60: function remote_reboot_sh {
A bit confusing name because the routine has nothing to do with reboot.

http://codereview.chromium.org/512003/diff/7001/4002#newcode93
src/scripts/image_to_live.sh:93: echo "Forcing update independent of the current
version"
This change adds an -f flag to force update.
http://codereview.chromium.org/503088

http://codereview.chromium.org/512003/diff/7001/4002#newcode131
src/scripts/image_to_live.sh:131: # The softwareupdate.log gets pretty bit with
download progress
s/bit/big/

http://codereview.chromium.org/512003/diff/7001/4002#newcode166
src/scripts/image_to_live.sh:166: # This may fail while the machine is done so
generate output and a
The "right" way to do this is to babysit the boot process by checking the
boot_id:
/proc/sys/kernel/random/boot_id