os/dbuild.sh : Refactor dbuild.sh
os/dbuild.sh : Refactor dbuild.sh

I changed the hardcoded part of the dbuild.sh to read board-specific predefined options.
In addition, it provide board-specific options to the user with a menu

Samsung/TizenRT,pillip8282/TizenRT,jeongchanKim/TizenRT,jeongarmy/TizenRT,Samsung/TizenRT,jeongarmy/TizenRT,an4967/TizenRT,jeongchanKim/TizenRT,davidfather/TizenRT,jsdosa/TizenRT,chanijjani/TizenRT,jsdosa/TizenRT,junmin-kim/TizenRT,chanijjani/TizenRT,an4967/TizenRT,sunghan-chang/TizenRT,jeongarmy/TizenRT,an4967/TizenRT,sunghan-chang/TizenRT,Samsung/TizenRT,pillip8282/TizenRT,jeongarmy/TizenRT,chanijjani/TizenRT,jsdosa/TizenRT,an4967/TizenRT,davidfather/TizenRT,junmin-kim/TizenRT,an4967/TizenRT,jeongarmy/TizenRT,davidfather/TizenRT,an4967/TizenRT,chanijjani/TizenRT,jeongarmy/TizenRT,jeongchanKim/TizenRT,Samsung/TizenRT,pillip8282/TizenRT,davidfather/TizenRT,Samsung/TizenRT,jsdosa/TizenRT,davidfather/TizenRT,junmin-kim/TizenRT,pillip8282/TizenRT,junmin-kim/TizenRT,davidfather/TizenRT,sunghan-chang/TizenRT,jeongchanKim/TizenRT,junmin-kim/TizenRT,junmin-kim/TizenRT,sunghan-chang/TizenRT,jeongchanKim/TizenRT,Samsung/TizenRT,pillip8282/TizenRT,sunghan-chang/TizenRT,chanijjani/TizenRT,jeongchanKim/TizenRT,an4967/TizenRT,davidfather/TizenRT,Samsung/TizenRT,jsdosa/TizenRT,chanijjani/TizenRT,jsdosa/TizenRT,sunghan-chang/TizenRT,pillip8282/TizenRT,chanijjani/TizenRT,sunghan-chang/TizenRT,jeongarmy/TizenRT,jeongchanKim/TizenRT,junmin-kim/TizenRT,jsdosa/TizenRT,pillip8282/TizenRT