apps/testcase/kernel : Add sigkill handler test in tc_signal.c
apps/testcase/kernel : Add sigkill handler test in tc_signal.c

If a task or pthread receives a SIGKILL, TizenRT finishes the task or pthread.
This testcase will test this functionality.

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