webos: Add Ubuntu 12.10, remove 11.04 from SANITY_TESTED_DISTROS

* we're not testing new images with 11.04 anymore
* 12.10 works correctly

Open-webOS-DCO-1.0-Signed-off-by: Martin Jansa <martin.jansa@palm.com>
Change-Id: Ib4dc635cc8f298af007a70619b5f6b745a84adb6
Reviewed-on: http://g2g.palm.com/1520
Reviewed-by: Build Verification
Reviewed-by: Martin Jansa <martin.jansa@palm.com>
Tested-by: Martin Jansa <martin.jansa@palm.com>
Reviewed-by: Steve Winston <steve.winston@palm.com>
Tested-by: Steve Winston <steve.winston@palm.com>
Reviewed-by: Susan Montooth <susan.montooth@palm.com>