image_to_vm: convert to calling setimage directly

image_to_vm: convert to calling setimage directly

The last changes to the installer broke image_to_vm.  Since image_to_vm
doesn't need to run postinst, but just change the active image, it
now just calls chromeos-setimage and passes in its needed flags (already
supported by the last installer change).  It will also detect whether
the image was built with verification of the rootfs enabled or not
by looking at the default.cfg file.

Also updates the location of where you should run the command in
build_image.

TEST=built a new image with --enable_rootfs_verification and started with qemu -curses -hda [output]; did the same without verification
BUG=chromium-os:2963

[zel, 2010-07-23 20:44:54]

LGTM

+ a minor issue, rkc should be the ultimate reviewer of this change

http://codereview.chromium.org/3034030/diff/1/3
File image_to_vm.sh (right):

http://codereview.chromium.org/3034030/diff/1/3#newcode217
image_to_vm.sh:217: --rootfs_image="${TEMP_ROOTFS}" \
tabs?

[Will Drewry, 2010-07-23 21:43:15]

Nice catch - thanks!  I should learn not to edit files under the chroot :)

http://codereview.chromium.org/3034030/diff/1/3
File image_to_vm.sh (right):

http://codereview.chromium.org/3034030/diff/1/3#newcode217
image_to_vm.sh:217: --rootfs_image="${TEMP_ROOTFS}" \
On 2010/07/23 20:44:55, zel wrote:
> tabs?

Done.

[Will Drewry, 2010-07-24 12:41:12]

Imma moron.  I pushed this after the style fixes without thinking.
Sorry!  @rkc@ let me know what you'd like fixed up.

cheers! will

On Fri, Jul 23, 2010 at 4:43 PM,  <wad@chromium.org> wrote:
> Nice catch - thanks!  I should learn not to edit files under the chroot :)
>
>
> http://codereview.chromium.org/3034030/diff/1/3
> File image_to_vm.sh (right):
>
> http://codereview.chromium.org/3034030/diff/1/3#newcode217
> image_to_vm.sh:217: --rootfs_image="${TEMP_ROOTFS}" \
> On 2010/07/23 20:44:55, zel wrote:
>>
>> tabs?
>
> Done.
>
> http://codereview.chromium.org/3034030/show
>