examples/security_test: remove calling mkkconfig
examples/security_test: remove calling mkkconfig

Security_test example does not need to call mkkconfig script.
It causes error on make as shown below:

make[3]: m: Command not found
Makefile:41: recipe for target 'preconfig' failed
make[3]: [preconfig] Error 127 (ignored)
make[3]: o: Command not found
Makefile:41: recipe for target 'preconfig' failed
make[3]: [preconfig] Error 127 (ignored)
make[3]: Leaving directory '/home/sunghan/Work/TinyAra/Forked_TizenRT/apps/examples/security_test'

Signed-off-by: sunghan-chang <c954e25285721d8faa8b1a5c1ae2ef5a35338d32@samsung.com>

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