loadable_apps: Fix build error during protected build
loadable_apps: Fix build error during protected build

Following build error happens during protected build.

nm: '/home/kishore/tinyara/TizenRT_kishore/loadable_apps/micomapp/micom': No such file
CC: /home/kishore/tinyara/TizenRT_kishore/os/board/common/userspace/up_userspace.c
/home/kishore/tinyara/TizenRT_kishore/os/board/common/userspace/up_userspace.c:57:28: fatal error: tinyara/config.h: No such file or directory
 #include <tinyara/config.h>
                            ^
compilation terminated.

In order to fix this error, we disable building of loadable apps in
protected build configuration.

Signed-off-by: Kishore SN <33058dcca7ce956a91a61ef5ae8fb790ece75b5f@samsung.com>

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