task-webos-extended: provide upgrade path from task-webos-core

* add RPROVIDES/RREPLACES/RCONFLICTS to replace task-webos-core
  package by task-webos-extended package during upgrade on target

Open-webOS-DCO-1.0-Signed-off-by: Martin Jansa <martin.jansa@gmail.com>
Change-Id: Icc1f7d2e0c53aa554189c7752d6ec16cd2f8c1f0
Reviewed-on: http://g2g.palm.com/1096
Reviewed-by: Herb Kuta <herb.kuta@palm.com>
Tested-by: Herb Kuta <herb.kuta@palm.com>