loadable_apps/micom/messaging : Merge duplicated signal setting code
loadable_apps/micom/messaging : Merge duplicated signal setting code

There is duplicated code about setting to receive SIGMSG_MESSAGING and SIGUSR1.

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