os/Makefile.unix: Automate compression tool creation process
os/Makefile.unix: Automate compression tool creation process

- compression tool (mkcompressimg) is created during build
  before binaries that are to be compressed are created

Signed-off-by: Amandeep Chauhan <37755504c51ffa7243265501fdc704ed5e783aaa@samsung.com>

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