webos-preferred-versions: add preferred versions for qt4-embedded

Open-webOS-DCO-1.0-Signed-off-by: Martin Jansa <Martin.Jansa@gmail.com>
qt4-embedded: use our own repo with all fixes included

* it will use normal qt4-native-tools from oe-core
  instead of mixing target and native stuff in 1 recipe like qt4-webos
  did

Open-webOS-DCO-1.0-Signed-off-by: Martin Jansa <Martin.Jansa@gmail.com>
qt4-embedded: add flags from qconfig-palm.h

Open-webOS-DCO-1.0-Signed-off-by: Martin Jansa <Martin.Jansa@gmail.com>
qt4-embedded: disable QT_KEYPAD_NAVIGATION

Open-webOS-DCO-1.0-Signed-off-by: Martin Jansa <Martin.Jansa@gmail.com>
qt4-embedded: disable tools, examples and demos

* some of them does not build with our minimal config

Open-webOS-DCO-1.0-Signed-off-by: Martin Jansa <Martin.Jansa@gmail.com>
qt4-webos: drop

Signed-off-by: Martin Jansa <Martin.Jansa@gmail.com>