autotest/factory: improve message feedback on UI

autotest/factory: improve message feedback on UI

This CL improved factory UI message feedback by:

 - allowing gooftool output goes to console immediately
 - provides hardware components matching results on Review screen

This CL needs to be applied with http://codereview.chromium.org/6733063
.

BUG=chromium-os:13459
TEST=Running hardware_Components on UI.
     The probing verbose message now displayed progress immediately.
     For "unmatched" results, the review page will list the difference.
     Sample:

     TestFail: No HWID matched.
     Unmatched for XXX:
    {'hash_ec_firmware': ['644f95ee34c79ebf833c3f6002325b33506ecf18449e9b2c574e519a2e573e6e'],
     'key_recovery': ['No match'],
     'key_root': ['No match'],
     'part_id_3g': ['No match'],}
     Unmatched for YYY:
    {'part_id_3g': ['No match'],
     'part_id_audio_codec': ['Realtek ALC271X'],
     'part_id_cpu': ['Intel(R) Atom(TM) CPU N570   @ 1.66GHz'],
     'part_id_ec_flash_chip': ['Winbond W25x40']}

Change-Id: Ie63c327a114e82f17b0601f8748f015b9be9f32c

R=tammo@chromium.org,nsanders@chromium.org

Committed: http://chrome-svn/viewvc/chromeos?view=rev&revision=73511ca

[Hung-Te, 2011-03-30 03:04:37]

Any feedbacks?

[Nick Sanders, 2011-03-31 06:57:34]

lgtm