luna-sysservice: make it MACHINE_ARCH
luna-sysservice: make it MACHINE_ARCH

* we're depending on MACHINE specific qt4-webos so better to build it as MACHINE_ARCH
  then rebuild it after each MACHINE switch as TUNE_PKGARCH

* this is temporary solution, qt4-webos should be changed to be TUNE_PKGARCH
  but that needs some changes in qt repo too.

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

Garfonso/meta-webos-ports,openwebos/meta-webos,openwebos/meta-webos,openwebos/meta-webos,nizovn/meta-webos-ports,Garfonso/meta-webos-ports,openwebos/meta-webos,nizovn/meta-webos-ports