apps: fix incorrect syntax on Kconfig
apps: fix incorrect syntax on Kconfig

'make menuconfig' complains as following:

    mkkconfig in /home/heesub/Documents/artik053/tinyara/apps
    make[1]: Leaving directory '/home/heesub/Documents/artik053/tinyara/apps'
    /home/heesub/Documents/artik053/tinyara/apps/examples/artik_examples/Kconfig:32: syntax error
    /home/heesub/Documents/artik053/tinyara/apps/examples/artik_examples/Kconfig:31: unknown option "-"
    /home/heesub/Documents/artik053/tinyara/apps/examples/artik_examples/Kconfig:32: unknown option "-"
    /home/heesub/Documents/artik053/tinyara/apps/examples/artik_examples/Kconfig:33: unknown option "-"
    /home/heesub/Documents/artik053/tinyara/apps/examples/artik_examples/Kconfig:34: unknown option "-"
    Makefile.unix:567: recipe for target 'menuconfig' failed
    make: *** [menuconfig] Error 1

Change-Id: I1d43d6ca0c04da3fad0d6f5dbf00d75423a11f33
Fixes: 374c90c6adee ("artik-sdk: Add ARTIK SDK example program")
Signed-off-by: Heesub Shin <45471ea77bd08f3d26635f3f5adb40ba41250a2b@samsung.com>

JunhwanPark/TizenRT,JunhwanPark/TizenRT,JunhwanPark/TizenRT,JunhwanPark/TizenRT,JunhwanPark/TizenRT,JunhwanPark/TizenRT