use FD.o icon naming

Doesn't seem to have anything to do with elementary OS; I can't afford patching update-manager just for the sake of having a proper icon name.

It affects us because we ship it. It doesn't need to be patched, it needs to be fixed upstream. It would be better to leave it confirmed and assign it to drive by.

This bug was fixed in the package update-manager - 1:0.156.8

---------------
update-manager (1:0.156.8) precise; urgency=low

  [ Robert Roth ]
  * Update icon name to use FD.o standard (LP: #921310)

  [ Julien Lavergne ]
  * DistUpgrade/DistUpgrade.cfg, DistUpgrade/removal_blacklist.cfg,
    UpdateManager/Core/utils.py,
    AutoUpgradeTester/profile/lubuntu/DistUpgrade.cfg:
   - Add Lubuntu support, and don't upgrade gnome-components which have been
     removed from Lubuntu installation (LP: #945215)

  [ Barry Warsaw ]
  * Improve the warning issued when i8xx graphics hardware is
    detected. (LP: #941172)

  [ Brian Murray ]
  * DistUpgrade/removal_blacklist.cfg:
    - blacklist gnome-session so that users can always login after a failed
      partial upgrade (LP: #946539)

  [ James Hunt ]
  * Only attempt to stop screensaver if DISPLAY set, and throw away
    xdg-screensaver output. (LP: #883618)

  [ Colin Watson ]
  * Use 'from dbus.mainloop.glib import DBusGMainLoop;
    DBusGMainLoop(set_as_default=True)' to set up the main loop, rather than
    importing the deprecated dbus.glib.

  [ Gabor Kelemen ]
  * Fix misplaced parentheses. LP: #952959
 -- Michael Vogt <email address hidden> Tue, 13 Mar 2012 15:29:59 +0100